Practical guides and troubleshooting for Microsoft Exchange environments.
Mail flow issues, certificate problems, database mounting errors, Autodiscover failures, SMTP configuration, hybrid setups, and real-world PowerShell scripts used for administration, diagnostics, and automation.
Focused on keeping Exchange stable, maintainable, and operational in production.
The Problem You are upgrading Exchange 2016 to CU23 and the installer keeps failing at “Mailbox role: Client Access service” with errors like these: Or: Every time you fix one error and re-run Setup, it fails on a different virtual directory. This guide covers the complete process from first failure to successful completion. Why This … Read more
The Problem One morning users start complaining they cannot access OWA. Outlook shows “Trying to connect…” and never connects. You open the browser and see: Or worse: an ERR_TOO_MANY_REDIRECTS loop that never stops. You RDP into the server. All Exchange services are running. IIS AppPools are started. Nothing looks obviously wrong. This guide covers the … Read more
Full Error When trying to log in to Outlook Web App (OWA), users may see the following error: What This Error Can Mean This error is not always caused by a single issue. In general, it may be related to: So first, always verify basic Exchange health: When This Article Applies If everything above looks … Read more
In enterprise environments, phishing campaigns can impact hundreds or thousands of mailboxes within minutes. Once malicious emails are delivered, administrators must respond quickly and remove them centrally. This article presents a production-ready PowerShell script designed for bulk phishing email removal across all user mailboxes in on-premises Exchange environments. The script is intended for: This solution … Read more
Faced the following issue A user reported that emails were sent successfully, but Gmail recipients never received them. There were no visible errors in Outlook, however mail flow logs showed the following rejection: Cause The email was sent: Example: Gmail checks: Result: Gmail rejects the message as spoofed. Why this happens You cannot send as … Read more
SSL certificates on legacy infrastructure like Exchange Server 2010 often become a problem at the worst possible moment — when users start seeing “Not Secure” warnings in Outlook Web App (OWA) or mail flow begins to fail due to an expired certificate. Replacing an SSL certificate in Exchange 2010 is not just a matter of … Read more