Forum Discussion
Exchange Transport Rule Remove SharePoint Links
Hey everyone,
So we recently implemented an Exchange online (M365) transport rule to add a small amount of HTML text at the top of the email, warning the email has come from an outside source, however this appears to have caused an issue with sharePoint links sent from external parties.
The image etc are all there, and all the links to Microsoft.com etc are all fine, however the image for the excel/ word doc etc, are now just blank images, without the URL behind. If you remove the transport rule its all fine.
The HTML on the transport rule is this
There's nothing in there to strip the attachments, but the email is being modified by the HTML warning, so its plausible to see with Exchange would see it as a threat. We do have the safe senders part of Exchange turned on etc.
Any thoughts?
Ta
2 Replies
Hi ChrisGould
Are you using the External Tag?
https://blog.icewolf.ch/archive/2021/03/12/exchange-online-mark-mails-from-external/
The Mails from Sharepoint are considered External and that means keep beeing suspicious.
Regards
Andres
- Hi,
Yeah we are applying it to all external emails, which is ideal as an extra warning for any files shared from external sources.
If we share a file onedrive/ sharpeoint internally, the warning rule is not activated, and hence the link is not removed.
Cheers
Chris
