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It gives Set-CasMailbox MailboxName -MapiBlockOutlookNonCachedMode:$falseīut again its only for onpremis-exchange according to this. So was looking for an viable alternative. It will still allow users to save offline copies in outlook/thunderbird etc. "Outlook Web App policies" wont disable offline access for outlook/thunderbird etc. The problem lies with outlook and other clients such as thunderbird. This message will appear, which is as expected. If a user tries to enable offline access via As intended It will disable offline storing in Unfortunately it works only for webaccess. What I have tried is I have applied a policy using "Outlook Web App policies" in ourlook 365 via "permissions" -> "Outlook Web App policies" and disabled offline access in the below manner.
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We are trying to disable storing emails offline. We use different operating systems, such as mac/ubuntu/fedora/widnows to access emails which makes hard to stick to local group policy to block storing offline cache copies.
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We use outlook 2016, thunderbird and the exchange server is office 365 tenant. My company has a security concern and they have requested to disable storing all offline cache copies of office 365 emails.
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