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License Server HA RRS feed

  • Question

  • We are currently planning our DR implementation for site failover and wanted to know if we need to have an RDS license server up and running for our DR RDS deployment, or is there a "grace period" by which even if the license server is unavailable, nonetheless users will still be able to connect.

    I saw this post (https://www.microsoftpressstore.com/articles/article.aspx?p=2346349&seqNum=4) but it didn't answer all my questions.

    BTW - this question also applies where we have a production farm, and the license server has crashed and is (temporarily) unavailable. How long can we continue to be up and running without our license server.

    We are currently using Per User licensing on Windows 2019.

    Tuesday, October 22, 2019 9:16 AM

Answers

  • Hi,

    >Although there is a licensing grace period during which no license server is required, after the grace period ends, clients must have a valid RDS CAL issued by a license server before they can log on to an RD Session Host server.

    Quote from “License your RDS deployment with client access licenses (CALs)”:
    https://docs.microsoft.com/en-us/windows-server/remote/remote-desktop-services/rds-client-access-license

    Please note that, the grace period begins the first time the TS/RD Session Host server accepts a client connection. And, the grace period ends when either of the following conditions is met:
    1. A permanent TS/RDS CAL is issued by a license server to a client connecting to the terminal server, or a permanent RDS client access license (RDS CAL) is issued by a license server to a client connecting to the RD Session Host server.
    2. The number of days in the grace period is exceeded.

    So, make sure that your RDS still have valid grace period and no licensing server is required. 

    Best Regards,
    Eve Wang

    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    • Marked as answer by Reuvy Wednesday, October 23, 2019 6:04 AM
    Wednesday, October 23, 2019 2:06 AM
    Moderator

All replies

  • Hi,

    If the RD Licensing server is down/unreachable, users will receive a message at log on telling them there is a licensing issue and their session will be disconnected in 60 minutes.  After 60 minutes they will be disconnected by the server, and can re-connect if they want.  Users that were already connected when the RD Licensing server went down will be unaffected, provided they stay connected.

    For your DR environment I recommend you have an RD Licensing server up and running, but without any RDS CALs installed.

    -TP

    Tuesday, October 22, 2019 11:24 AM
    Moderator
  • What's weird is that we indeed received the message that there is a problem with our license server but we were connected for over 2 hours and never got disconnected. Maybe something has changed? Is any of this documented?
    Tuesday, October 22, 2019 2:20 PM
  • What's weird is that we indeed received the message that there is a problem with our license server but we were connected for over 2 hours and never got disconnected. Maybe something has changed? Is any of this documented?

    The handful of times I have run into it the server has always disconnected the session.  Perhaps something has changed in a recent update or you inadvertently stumbled upon an edge case where the disconnect functionality doesn't trigger.  I don't know of any documentation on this.

    -TP

    Tuesday, October 22, 2019 2:56 PM
    Moderator
  • Hi,

    >Although there is a licensing grace period during which no license server is required, after the grace period ends, clients must have a valid RDS CAL issued by a license server before they can log on to an RD Session Host server.

    Quote from “License your RDS deployment with client access licenses (CALs)”:
    https://docs.microsoft.com/en-us/windows-server/remote/remote-desktop-services/rds-client-access-license

    Please note that, the grace period begins the first time the TS/RD Session Host server accepts a client connection. And, the grace period ends when either of the following conditions is met:
    1. A permanent TS/RDS CAL is issued by a license server to a client connecting to the terminal server, or a permanent RDS client access license (RDS CAL) is issued by a license server to a client connecting to the RD Session Host server.
    2. The number of days in the grace period is exceeded.

    So, make sure that your RDS still have valid grace period and no licensing server is required. 

    Best Regards,
    Eve Wang

    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    • Marked as answer by Reuvy Wednesday, October 23, 2019 6:04 AM
    Wednesday, October 23, 2019 2:06 AM
    Moderator
  • And the grace period is 120 days?

    Assuming a month ago my license server was down, and then it came back, and then another month after again it was down, the grace period restarts each time from scratch?

    Wednesday, October 23, 2019 4:49 AM
  • And the grace period is 120 days?

    Assuming a month ago my license server was down, and then it came back, and then another month after again it was down, the grace period restarts each time from scratch?

    No, the grace period doesn't start/stop and/or restart.

    -TP

    Wednesday, October 23, 2019 5:18 AM
    Moderator
  • Hi,

    Agree with TP. It will not stop nor re-start once the grace period has begun. 

    Best Regards,
    Eve Wang

    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Wednesday, October 23, 2019 6:56 AM
    Moderator