CommPulse

Hi all, I've got a user on my tenant who has an AD (on-premise) account with an email address being : ******@mydomain.com with an smtp pointing to an external address from another tenant , let's say : ******@external.com. He is a mailUser on exchange (doesn't have a mailbox on our tenant, no e3 license, just mail-enabled : his email address is resolved and reaches to his external mailbox whenever someone sends his an email using ******@mydomain.com). Since yesterday, he was communicating with a third-party company (from a whole other tenant then) and the company in question was using the mydomain address to communicate with him. The problem now is that the emails from this company are not getting delivered. I've created a trace on exchange online to track the emails and these are the message events. The failure reason displayed is: Reason: [{LED=550 Administrative prohibition - envelope blocked - https://community.mimecast.com/docs/DOC-1369#550 [nyMds-WOM0Wfq7ynEsvxtQ.uk66]};{MSG=};{FQDN=eu-smtp-o365-outbound-2.mimecast.com};{IP=195.130.217.244};{LRT=7/29/2026 12:10:12 PM}]. OutboundProxyTargetIP: 195.130.217.244. OutboundProxyTargetHostName: eu-smtp-o365-outbound-2.mimecast.com. We do have mimecast in our system as an external layer (it's configured as : user | o365 | mimecast | outside) and mimecast says that this sender is blocked at policy level. The other users from our tenant are communicating fine with this external company and there is no policy preventing them from sending emails to the users in our tenant. My theory is that this comes from the external tenant in which he has his mailbox. I'm a bit confused, any thoughts on that? Many Thanks! submitted by /u/tfen_dep2 [link] [comments]

This is the only thread where you should post news about becoming certified. For everyone else, join us in celebrating the recent certifications!!! submitted by /u/AutoModerator [link] [comments]

The Microsoft cloud changes very quickly. New Azure services, security updates, AI features, architecture guidance, and Microsoft 365 improvements are released almost every day. I have always found it difficult to keep up with everything that is happening. Following multiple blogs, documentation sites, and news sources takes a lot of time. That is why I created, and also vibe coded 🏄🏼, the Cloud Dashboard. It is a single place where I, and anyone else working with Microsoft technologies, can easily see the latest Microsoft updates. Instead of checking many different websites, you can find the most important Microsoft cloud news in one place. The idea came to me while thinking about the summer holidays. Even though we all need time away from work, I still like to know what is happening in the Microsoft world. Whether you are relaxing on the beach, sitting by the pool, or simply enjoying your holiday, it is nice to have an easy way to stay up to date without spending hours searching for information. I thought some of you might find it useful as well, so I wanted to share it here. Blog submitted by /u/brianveldman [link] [comments]

Hi everyone, I'm a 2025 Computer Science graduate from India. I'm struggling to get an IT support or infrastructure support job mainly because my spoken English isn't very strong, even though I can troubleshoot issues practically. I'm considering joining a BPO (technical support/chat support) for financial stability while continuing to learn Linux, Git, Docker, AWS, Kubernetes, and DevOps after work. Has anyone here transitioned from BPO or technical support into DevOps or cloud roles? How difficult was it, and what roadmap or advice would you recommend? I'd really appreciate hearing your experiences. submitted by /u/Melodic_Struggle_95 [link] [comments]

While everyone celebrates when things work, few see the effort it takes to keep them that way. Tomorrow, we celebrate the people who make it happen. Happy SysAdmin Day to all the wonderful SysAdmins out there! submitted by /u/WrencyLily [link] [comments]

Not going to lie. It's been a bad day. I almost tell them "take this job and shove it' after reviewing all these crappy AI codes. Vibe coding is not only a joke. It's a monster that mocks our hard-earned experiences! I am thinking of leaving the industry! If you could go back ten years from now and know what you're knowing right now, would you still do DevOps? submitted by /u/Inner-Chemistry8971 [link] [comments]

I've recently replaced the cat6 infrastructure around the site I look after and introduced a 10Gb fibre ring between all switches for resilience and performance. However... it's highlighted that our WiFi infrastructure is woefully inadequate. It's Unifi, which I don't necessarily have a problem with for a business our size - 2 floor factory with 130 employees - but before I buy a load more access points to patch all the poor signal areas, is there a more suitable solution I should be considering? I don't have a budget in mind but I'd like to avoid the very expensive enterprise level solutions if possible. Whatever I use has to be available in the UK. submitted by /u/Obvious-Water569 [link] [comments]

So I'll preface by saying I'm not a sysadmin. I work primarily with IoT and automation. Recently, due to hard drives failing. Several of our VMs got wiped. And the ones that were salvaged were backups from months ago so all work done in the past month or so. That includes several docker containers, databases, scripts and SCADA projects. All gone. Basically a huge chunk of our infrastructure is on fire right now. Due to this, I randomly decided to inspect the VM mac addresses for once. And to my horror. It turns out they're using Vmware workstation. Now I may not be a sysadmin, but I do have a Proxmox server at home running opnsense. And my main machine is arch Linux. So I have some basic VM experience. Isn't it typical to assume that production servers run on Esxi, KVM/QEMU or HyperV. Or is this a far more common occurrence than what I'm assuming as an outsider to the professional sysadmin world. I would like to believe that hardware failures aside the general instability of these VMs have to do with running a type 2 hypervisor rather than a type 1. Is using workstation and even virtual box (ew) something that commonly happens in more legacy infrastructure? submitted by /u/The_Galatiatex [link] [comments]

Hello everyone, I am interested in going for Google Professional Cloud Architect exam not sure how to start my journey. Any suggestions? I have 12 years of experience in Cisco routing and switching, DC and observability. Thanks submitted by /u/insomniac_phantom [link] [comments]

Hello all, To preface this: the matter this relates to has already been reported through the appropriate channels, including AWS' compliance process and relevant authorities. The reason I am asking here is that I have struggled to clearly explain the technical side of the infrastructure and what information would actually be available to AWS. The context is that I encountered a Tor hidden service that appeared to be using Amazon CloudFront, presumably for CDN functionality (and possibly WAF-related features, although I am not certain). From what I could tell, it appeared to primarily be acting as a CDN rather than anything else. The question I have been trying to answer for quite some time is: what visibility would Amazon/CloudFront have into the service behind it? I am familiar with Cloudflare's approach to Tor-related services, but I am less familiar with how Amazon CloudFront handles this type of setup. My assumption is that if CloudFront was genuinely being used, the distribution would have some configured origin/backend relationship — but I am unclear what that means from AWS' perspective. Specifically: Would AWS know the origin server/backend configured behind the CloudFront distribution? Would the use of Tor change anything about what CloudFront can see on the server/CDN side? Are there cases where CloudFront could be involved without AWS having visibility into the actual hosting infrastructure? I am mainly trying to understand the technical architecture and put some uncertainty to rest. submitted by /u/DrDeath47 [link] [comments]

I am an admin for an ERP/PPM platform with tens of thousands of users. since the MCP has been available, and our org is largely encouraged to adopt AI, we suddenly have thousands of solution architects, all building their dream solutions with help from AI. now my team rarely hears from the users to build artifacts to support their processes because to whatever extent possible they are self-serving. The problem is, they are all doing so in a vacuum, and the environment becomes hyper fragmented with thousands of custom built solutions. and this is even with us disallowing write access from the MCP. our position has been that anyone should be able to build insights and visualizations from their data, but there aren’t enough safeguards in place to prevent LLMs from creating or updating records that are very process-sensitive. as you can imagine, no one is hated more than us in the org right now for putting this barrier to success in their way. eventually, we will have to enable it because there is so much pressure. I guess what I’m wondering is what even is the role of a sys admin now if everyone is given the keys to develop their own solutions? my team used to enjoy the respect of our users for having deep expertise in the platform we support. Now we’re just treated like glorified license provisioners and success blockers because we don’t agree that they should be designing custom interfaces that completely replace the actual app UI, simply because the user believes they are now an expert and they know better. submitted by /u/Bamboodl [link] [comments]

I wanted to ask if anyone else experienced issues with Knowbe4's PhishRIP tool yesterday? For those of you who don't know, as the name suggests, it is a tool designed to let you remove phishing emails from user's inboxes. You select one or more parameters (sender, recipient, subject, etc) and it runs the query through exchange and moves any emails that match into a quarantine folder. However, yesterday some sort of freak incident occurred, and I'm not sure what you would even call it. But what happened was I submitted a query at 1:08pm EST looking for emails from a specific domain that had sent a handful of phishing emails. However, something caused the query to be processed with no parameters at all. So the query that went to Exchange was to find and quarantine any email. Which is what it attempted to do; it started going through every inbox at our organization (all 4900 employees) and moving their emails into a hidden quarantine folder. And because they do not allow customers to stop queries or bulk restore emails, we were pretty much helpless. If you have ever tried working with KB4 support, you'll know how terrible they can be, so currently I have no answers. I'm not clear if an issue with Exchange at that moment caused the query to process without any variables, or if KB4 sent it to Exchange completely blank due to some bizarre issue on their end. When I finally got someone at support to answer, even their entry level support did not have access to stop the query or restore the emails in bulk. They had to reach out to another team to do this and this took hours. But it was necessary because it only allows you to restore 200 at a time, which is not practical for close to a million emails. The query eventually ran its course at the end of the day, and they did something on the back end to start restoring emails. But many failed and needed to be manually restored. I was able to confirm with them that this issue did impact other customers, and they had an incident open for it (it has no useful details, but if you are curious you can find it by googling knowbe4 status, then look under past incidents). But so far I cannot find anyone else talking about the issue. This has me thinking that it only impacted customers who ran queries during a very short time window, since I had run a query around 10 minutes before this, and another one 6 minutes after and they worked correctly. It is baffling to me that they did not have any basic measures in place to prevent something like this from happening. Since the platform is meant for phishing emails and should not need to recall that many at once, I would have at the very least put limits on the back end that would stop the query if it exceeded a certain number of emails (maybe 1000), or if it tried to run for more than an hour. Because in the end, the query moved close to a million emails and ran for over 11 hours before it completed. So TLDR: I'm hoping maybe someone else got more information from support on this Knowbe4 PhishRIP issue, or possibly knows more in depth how these queries actually run and identified the root cause? (Also apologies if this post is too ramble-y; I normally try to solve problems myself, but I haven't been involved in a critical system like this since I broke a print server with a driver update at my first job) submitted by /u/CholoBurrito [link] [comments]

Recently took over managing DNS for my corporation. We have a domain name that is supposed to redirect to an ugly URL address. I can confirm the ugly URL address works just fine when I type it in, but when I type in the nice domain name I get an ERR_CONNECTION_TIMED_OUT. To make matters more confusing, I found this great website: https://redirectchecker.io and everything worked as expected. So now I don't know if a recent browser update could be the culprit, but I am having the issue in Brave and Edge. The nice domain name is hosted on eNom if that matters, and the ugly URL is what our webhost provided us. On eNom the Host record is pretty straightforward: Hostname: www (there's another host record for @ with the exact same info) Record Type: URL Redirect Address: <https://ugly url address> Any ideas on what could be the problem? It was working before, but we noticed it stopped working today. submitted by /u/dude_named_will [link] [comments]

We're about to spend a large amount of money on new GPU servers, we have reasonable pricing from the vendor we've had the best experiences with, and now our procurement person is telling us that we need 3 "competing" quotes and we're obligated to go with the cheapest one. That doesn't make sense to me for so many reasons. We currently have 4 GPU servers from vendor D and 1 GPU server from vendor H. The vendor H server is the only one with issues, and their "support" wasted literally days of my time before ultimately refusing to replace a clearly defective GPU. I think it's entirely reasonable to avoid vendor H from now on, but we could literally be forced to go with them over the vendor we actually want. I wouldn't be surprised if vendor H can offer lower prices when they refuse to replace defective parts. That's the practical side of things, but it also doesn't make any sense conceptually. The requirement assumes I can't be trusted to make purchasing decisions in the best interest of my employer, yet at the same time trusts me not to sabotage the other quotes. I could misrepresent the requirements so they pick hardware that's more expensive. I could be a huge jerk to all the approved vendors so they refuse to work with us, and then fill out another form saying that vendor D is the only one we're able to use. It doesn't even guarantee the best pricing, either. I'm going to other approved vendors first and they're just sourcing the parts from vendor D and vendor H anyway. I asked the procurement person if that's ok, and they said yes. If the concern is that vendor D is ripping us off, they could just give the reseller a higher price than they're charging directly to make the direct quote cheaper anyway. I'm convinced that whoever made that policy assumes that servers are just big MacBooks. submitted by /u/BemusedBengal [link] [comments]

A couple of months back we have placed order for a Dell server with blackwell GPU via a partner and were promised delivery by the end of August. Now partner came back saying the Dell production team has rejected the order saying the confguration is invalid. They are asking us to buy server with lower clock speed CPU other specifications will remain pretty much the same The biggest surprise is they want us to pay a big additional amount for this. Partner tells us that the configuration was validated and certified by Dell engineering teams in US and Korea. This is in USA, what are my options? submitted by /u/No_Category2170 [link] [comments]

submitted by /u/JayTheTech [link] [comments]

For the last few weeks, I've been speccing three servers for a hypervisor migration away from VMware. These will be datacentre nodes so they are very dense spec wise because the new hypervisor is per node pricing, so it makes more sense for us. Just got the quotes back. Five hundred and twenty thousand dollars for three servers. $520,000 !!!. Absolutely flabbergasted and I have to look my boss in the eye tomorrow and ask for that money. Anyone got a Dick Turpin hat? submitted by /u/LookAtThatMonkey [link] [comments]

I’m going into college and I really love technology related stuff. I love problem solving and creating solutions, but I also like hands on things. So I was wondering if like you guys think it’s a good idea to go into. I also see like a lot of people seeming stressed on this Reddit page so is it really stressful? I just wanna know what I’m getting into before actually trying to get up there. Thank you for taking your time reading this, any advice helps. submitted by /u/zaddyaddy9 [link] [comments]

Maybe it’s because I haven’t taken a proper vacation in lord know long. I don’t handle k8s, but I work with a containerized environment and pipelines etc. But with the speed everything seems to be going, and the constant push, I feel overwhelmed and just want nothing to do with technology…maybe I just need to step away for a bit…how are you guys dealing with this. Talking to other devops folks, looks like they too are drinking from the fire hydrant submitted by /u/hiamanon1 [link] [comments]

I'm only reaching out here because when I posted this in r/claude , it was removed with zero explanation. If there is a better place to ask, I'm all ears. Follows is my what I posted: I'm the IT Manager of a small technology company. Management and our dev team are jumping all in on AI and, specifically, Claude - far, far faster than I, as the guy responsible for our company's security, am comfortable with. A couple of caveats: I am very much aware of how helpful AI can be and what a boost in both productivity and effieciency it can be. I have a few pet projects I've used Claude for on a personal level that has been both impressive and, to an extent, scary. As the IT Manager, one of my primary jobs is to ensure the security of the company - our data, our infrastructure, etc. However, my goal has always been to try and make sure that doesn't impede my users' ability to do their jobs as much as I possibly can, trying to find that balance that allows me to maintain a secure environment but let them get their job done. I know that there is no stopping this train. I've expressed my concerns and while they were acknowledged, the gist was that we're moving forward. Part of my concerns is simply the unknown. I'm not overly familiar with Claude outside of the few small things I've dinked around with. Not knowing exactly how it would interact with our systems from a security standpoint puts me on a more cautious posture. What I'm looking for are some formal classes in admin or other areas that can help me better understand. If you've been in this position or can recommend some courses, I'd greatly apprecaite it. Thanks. submitted by /u/g-rocklobster [link] [comments]