Deleting OWA signatures for all users

[Kollektiv26]

Hi Everyone

 

Simple(ish) question hopefully has anyone found a good way to delete signatures from all users that are using Web Outlook

 

We are using Office 365 Online mail and not on prem

 

I can easily remove signatures for those using the old Outlook Desktop client.

 

Does anyone know a way to force delete users OWA signatures.

 

I know there is an option to disable access to signatures but this doesn't delete current ones

 

 

Thanks in Advance

[djm968]

This should work?

 

$mailboxes = Get-Mailbox -ResultSize unlimited;

$mailboxes | foreach { Set-MailboxMessageConfiguration -identity $_.alias -SignatureHtml "" -SignatureText "" -SignatureTextOnMobile ""}

 

Might be worth testing with a small sample of mailboxes first.

Edited October 9, 2023 by djm968

[Kollektiv26]

Cheers for the quick response

 

This is the script I've been using but it seems to have no effect

 

Connect-ExchangeOnline

$mailboxes = Get-Mailbox -ResultSize unlimited;$mailboxes | foreach { Write-Host $_.alias Set-MailboxMessageConfiguration -identity $_.alias -autoaddsignature $false }$mailboxes | foreach { Write-Host $_.alias Set-MailboxMessageConfiguration -identity $_.alias -SignatureHtml "" -SignatureText "" -SignatureTextOnMobile "" -AutoAddSignature $false -AutoAddSignatureOnReply $false -AutoAddSignatureOnMobile $false}

[djm968]

It seems this may be something to do with roaming signatures on your 365 tenant and you may have to ask MS to opt you out or disable this feature.

 

have a look at this thread.

https://github.com/MicrosoftDocs/office-docs-powershell/issues/8537

Edited October 9, 2023 by djm968