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How to set up out-of-hours auto-reply to a security group in outlook 365?

Bartek Polerowicz 20 Reputation points
2024-08-15T18:15:22.2833333+00:00

I would like to set up auto reply messages for different security groups in out of office hours (5pm - 9am Monday-Friday including all hours of the weekend and bank holidays), I have tried power automate before realising that I may not be able to change other users' auto-reply messages.

What is a solution that will work in this instance?

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Outlook Management
Outlook Management
Outlook: A family of Microsoft email and calendar products.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Vasil Michev 108.1K Reputation points MVP
    2024-08-16T07:00:05.8466667+00:00

    Security groups do not have an associated mailbox, thus there are no OOO/auto-reply settings to configure. Moreover, security groups are not valid Exchange recipients and cannot receive mail.

    A mail-enabled security group can receive messages, but you still cannot configure OOO on it. The usual workaround is to configure it on one of the members of the group instead. If this is the approach you end up using, make sure to also set the SendOofMessageToOriginatorEnabled flag on the group:

    Set-DistributionGroup groupname -SendOofMessageToOriginatorEnabled $true
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