When this happens to OWA, do this in Exchange PowerShell:
Remove-OwaVirtualDirectory "EXCHANGESERVERNAME\owa (default web site)" New-OwaVirtualDirectory
This came from here:
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"GetRedists", update/install all Microsoft redistributable libraries
"Optimize", multifaceted cleanup and speedup tool for Windows
Appx Cleanup for Windows 10/11 Performance
Clear System Volume Information (and Disable Sentinel One)
DISM Cleans Up Windows Updates and Cache
Fix Corrupt Windows using DISM and Updated INSTALL.WIM
Release server RAID bandwidth by removing Windows Defender
Renoberate & Clear Windows Logs
Set Windows to Prefer IPv4 over IPv6 (when Microsoft v6 networking goes haywire)
To Get HPE Product Number: The HPE PartSurfer!
Use All Available CPU Power in Current Windows!
USN journal in NTFS: delete and recreate for performance gains
winget: new Windows package management
Antivirus/Antimalware Tools and Issues
Disks, Drives, and Filesystems
Networking Analysis, Ports, & Protocols
Outlook & Exchange / Exchange Online
POTS lines (modems, FAX, etc.)
Remote Access, Remote Desktop, Terminal Server
Virtual Machines & Environments
When this happens to OWA, do this in Exchange PowerShell:
Remove-OwaVirtualDirectory "EXCHANGESERVERNAME\owa (default web site)" New-OwaVirtualDirectory
This came from here:
Categories: Exchange and Exchange Online