Answer by Joy Zhang for Shared mailboxes disabling other users
Can you tell me some details information about your environment? Did you check the event viewer and find some error messages? I found an article about shared mailbox for your reference.
View ArticleShared mailboxes disabling other users
Weird issue. Users log into their normal windows account. As they move from site to site, they log into Outlook to a Shared Mailbox. If Users 1, 2, 3, 4 decide to login in to the shared mailbox it...
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