Outlook patch (Build 19426.20218) broke “Encrypt Only” emails, showing unreadable attachments Workarounds: use Options ribbon encryption or revert to Build 19426.20186 via Command Prompt Microsoft ...
Microsoft is working to resolve a known issue that prevents some users from opening Excel email attachments in the new Outlook client. According to a service alert (EX1189359) seen by BleepingComputer ...
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