Exchange mailbox can receive mail but cannot send or open in OWA
One on-premises Exchange user can receive email normally, but Outlook fails whenever they send or reply with the error: "None of your email accounts could send to this…
Microsoft Exchange
One Exchange mailbox can receive mail but cannot send or open in OWA
One user on an on-premises Exchange server can receive email, but Outlook fails whenever they try to send or reply with the message: "None of your email accounts…
How can I remove an Outlook suggested recipient that keeps coming back?
An Exchange Online user keeps getting an incorrect autocomplete entry when typing a manager's name. The suggestion displays the manager's name but points to a third-party document-management address,…
How can I remove a phantom Outlook autocomplete contact that keeps coming back?
We manage Microsoft 365 for a client where several users see a strange autocomplete entry when they type the manager's name in Outlook. The suggestion displays the manager's…
Why Are Legitimate DocuSign Emails Triggering Highly Malicious Link Alerts?
Has anyone else seen legitimate DocuSign messages trigger highly malicious link alerts in a GCC tenant? We are seeing this across many incoming messages, including mail sent through…
Why Are Legitimate DocuSign Emails Triggering Highly Malicious Link Alerts?
Has anyone else seen legitimate DocuSign messages trigger Microsoft Exchange or email-security alerts for highly malicious links, particularly in GCC environments? This appears to be happening broadly across…
What can replace Exchange for on-premises calendars and resource booking?
I'm helping a large organization with several buildings and roughly 3,000 employees move away from Microsoft Exchange Server 2019/SE. The environment is completely disconnected from the internet, so…
What can replace Exchange for on-premises email, calendars, and resource booking?
I'm helping a large workplace that has several buildings and roughly 3,000 employees move away from Microsoft Exchange Server 2019/SE. The environment is isolated from the public internet,…
Where can I legitimately obtain the Exchange Server 2016 KB5121576 update?
Is there a legitimate way to obtain exchange2016-kb5121576-x64-en.exe? It appears to be available only through Extended Security Updates, and I'm trying to determine how to acquire the update…
How can I forward mail from an unlicensed Microsoft 365 account?
We recently ended contracts with several former employees and need to remove their Microsoft Exchange licenses. Their old addresses may still receive important messages, so I'd like those…
How can I forward mail from an unlicensed Exchange account?
We ended contracts with several employees and want to remove their paid Microsoft Exchange licenses without losing messages sent to their old addresses. Forwarding works while the accounts…
Is Microsoft Exchange experiencing widespread mail delivery and Outlook Web issues?
Is anyone else seeing Exchange Online problems in the US Central and Midwest regions? Some internal messages are delayed or failing with errors such as `432 4.2.0 STOREDRV.Deliver.Exception:AgentGrayException.CryptographicException`…
Is Exchange Online experiencing widespread mail delivery and Outlook Web issues?
Is anyone else seeing Exchange Online problems, especially in the US Central and Midwest regions? Internal messages are intermittently failing with errors such as `432 4.2.0 STOREDRV.Deliver.Exception:AgentGrayException.CryptographicException` and…
How much RAM does a small on-premises Exchange deployment really need?
I'm helping a nonprofit that handles sensitive medical information and currently hosts its email on-premises. They have fewer than 10 users and are considering upgrading from Exchange 2016.…
How should we handle a distribution list receiving over 2 GB of email attachments daily?
I inherited an Exchange setup where a distribution list sends more than 2 GB of high-resolution images from field operations to many users every day. Most users have…
What Are Some Good Alternatives to Microsoft Exchange?
With Microsoft's recent changes in licensing and the on-premises subscription model, I'm curious about what alternatives might work well for businesses. I'm looking for email solutions that also…
Should I Add Purchased Domains to Microsoft Exchange for Better Security?
Hey everyone! I'm in charge of IT at a small company, and since 2015, we've been using our main domain, XYZ.com, for everything like M365 and our website.…
Why is it so hard to find a good email client on Linux?
I've been using Linux again after a long hiatus, and while I'm loving it overall, I'm struggling with email clients. I've tried several like Thunderbird, Evolution, and KMail,…
Outlook Crashing Issues After April 2025 Updates
We've been experiencing issues with Outlook crashing after the April 2025 updates, specifically with the error message: 'The program OUTLOOK.EXE version 16.0.18623.20208 stopped interacting with Windows and was…