Skip to main content

Outlook Anywhere Certificate Proxy Errors when using a wildcard Certificate

By June 16, 2015June 7th, 2022Blog, Microsoft

If you are using a wildcard SSL certificate for your Exchange services, you may run into some issues when setting up Outlook Anywhere clients.  This stems from how the msstd setting defaults.  You can set your outlookanywhere external URLs properly, but unless you specify the CertPrincName value, you will get errors because instead of for example being set, it will default to

To fix this, simply run the following Exchange Powershell command:

Set-OutlookProvider EXPR –CertPrincipalName msstd:*

Your external outlook anywhere clients should now get the proper configuration from autodiscover

Josef Hanning, PEI

Leave a Reply