External email forwarding in Office 365 is blocked by default for security reasons. This guide explains how to enable it and fix the 550 5.7.520 access denied error safely.
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Issue Shared mailbox emails were not saved in the Shared mailbox Sent Items folder but in the user’s personal Sent Items folder in Outlook. Solution We can follow one of the three methods to resolve this issue. Modifying the registry key on each computer where the shared mailbox profile is configured. Using Set-MailboxSentItemsConfiguration PowerShell
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OWA or ECP stop working after installing Exchange Server security update Release Date: March 4, 2021 Symptoms After you install a security update on a server that’s running Exchange, either Outlook on the web (OWA) or Exchange Control Panel (ECP), or both these applications stop working on the server. OWA displays the following error message:
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