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Do Shared Mailboxes in Exchange Server On-Premises Require CALs?

Kocot K 5 Reputation points
2024-10-02T05:35:54.3133333+00:00

Hello everyone,

I have a specific question about on-premises Exchange Server (Exchange 2019). I understand that users and devices accessing the server generally require Client Access Licenses (CALs). However, I want to clarify how this applies to shared mailboxes in an on-premises environment.

Do shared mailboxes in Exchange Server on-premises need their own CALs, or are they covered as long as the users who access them have their own CALs? Also, are there any specific situations where a shared mailbox might require additional licensing (e.g., for compliance features like archiving)?

Thanks for your assistance!

Exchange Server
Exchange Server
A family of Microsoft client/server messaging and collaboration software.
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  1. Xintao Qiao-MSFT 4,150 Reputation points Microsoft Vendor
    2024-10-02T09:18:44.1466667+00:00

    Hi,@Kocot K

    In an on-premises Exchange Server environment, such as Exchange 2019, shared mailboxes don't require their own Client Access License (CAL). However, any user accessing a shared mailbox must have their own CAL. This means that as long as all users have the appropriate licenses, the shared mailbox itself does not require a separate CAL.

    If you're using advanced compliance features such as archiving, legal hold, or data loss prevention (DLP), additional licenses may be required for both the shared mailbox and the users who access it. For example, these advanced features may require an Enterprise CAL (ECAL).

    If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

  2. Amit Singh 4,986 Reputation points
    2024-10-04T05:52:40.72+00:00

    There is no need for separate CALs for shared mailbox, if users have their own CALs. For archiving and compliance needs, you will need an additional licensing for specific features.

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