Unable to change OWA's Signature through PowerShell

Question

I am trying to update my Outlook Web's signature with PowerShell, like I always do, with the "Set-MailboxMessageConfiguration" command, but the signature is not updated in users' owa signature, but "Get-MailboxMessageConfiguration" shows that the new signature is there.

Answer 1

Hi @janak,
I tested in my lab and got the same results.
Therefore , I have looked up some information about this issue.
According to the official documentation of the set-mailboxmessageconfiguration command, the Signaturehtml parameter doesn’t work if the Outlook roaming signatures feature is enabled in your organization. However, it is enabled by default.

As a workaround, I would suggest that you could change OWA's signature by compose and reply in the settings page.
Hope this works for you!Thank you for your understanding!

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