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'Message could not be saved' error sending encrypted email in Outlook 2016 for Mac

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Symptoms

In Microsoft Outlook 2016 for Mac, you compose a new encrypted email message addressed to a user in the global address list (GAL). When you click Send, you receive the following error message and the email does not send:

Message could not be saved.



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Cause

This issue may occur when the email message recipient's name in the GAL differs from the name on their certificate due to case sensitivity.

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Workaround

To work around this issue, manually enter the full email address of the recipient instead of selecting them from the GAL.

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Keywords: kb

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Article Info
Article ID : 3163197
Revision : 2
Created on : 5/20/2019
Published on : 5/20/2019
Exists online : False
Views : 215