Hello in mobile devices and outlook in windows still cannot block attachment only.
I created an access and session policy just to be sure but with the same results
Conditional Access Block Download Attachment
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Hello , I trying for a few days to enable correct a Conditional Access Policy that blocks attachments to download.
I managed to block attachment in owa but still have the option to save it to one drive.
In windows i have the option to save it locally or in OneDrive. In mobile app i have the option to save it to device.
The conditional access policy
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Evangelos Rizos 1 Reputation point
2021-04-01T07:18:32.967+00:00 -
KyleXu-MSFT 26,256 Reputation points
2021-04-01T08:38:37.243+00:00 If so, why not use transport rule to block email which contains attachment directly:
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Evangelos Rizos 1 Reputation point
2021-04-01T09:26:30.54+00:00 Yes but the user hasn't the opportunity to view the attachment. I want the users to preview their files but not download them from anywhere.
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Evangelos Rizos 1 Reputation point
2021-04-06T06:05:45.183+00:00 Hello I created a ticket in Microsoft. They told me that in outlook windows application cannot be managed via cloud service the only thing it can be done is from registry to block attachments. So for the Outlook mobile does not use ActiveSync anymore and many of the restrictions doesn't work.