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VUM failed to authenticate

  • 1.  VUM failed to authenticate

    Posted Jul 25, 2018 04:51 PM

    Hi,

    I'm facing this error everytime on my vCenter 6.7:

    I tried restarting the service, but everytime I logon again on vCenter it continues to show up.

    Any advice?



  • 2.  RE: VUM failed to authenticate

    Posted Jul 25, 2018 05:11 PM

    Did you provide the correct credentials to VUM to connect to vCenter (administrator@vsphere.local)?? Is this the vCSA or Windows installed??



  • 3.  RE: VUM failed to authenticate

    Posted Jul 25, 2018 05:18 PM

    Yes, the VUM works normally if I just restart the service.

    It is vCSA.

    This is the same vCenter after restarting the service:



  • 4.  RE: VUM failed to authenticate
    Best Answer

    Posted Jul 25, 2018 06:28 PM

    This is Known Issues

    Check if the following VMware KB article helps: VMware Knowledge Base

    VMware vSphere Update Manager 6.7 Release Notes

    Please consider marking this answer "correct" or "helpful" if you think your question have been answered correctly.



  • 5.  RE: VUM failed to authenticate

    Posted Jul 25, 2018 06:32 PM

    Thanks Diego!



  • 6.  RE: VUM failed to authenticate

    Posted Aug 16, 2018 02:47 PM

    Upgraded my VCSA 6.7 to 6.7d and still VUM is showing the same error, despite claiming it was fixed in 6.7c.

    Anyone else experiencing the same?



  • 7.  RE: VUM failed to authenticate

    Posted Sep 14, 2018 05:28 AM

    Restart Update Manager does'nt work

    Still Same Error



  • 8.  RE: VUM failed to authenticate

    Posted Apr 10, 2020 03:40 PM

    We have had this error for quite some time now.  Of course we can upgrade vCenter, but for VUM only wasn't worth it.  The KBs are wrong.  The fixes don't work.  We've tried it all.  This thread should not be labeled as "Solved", but rather "Solved for some."

    I'm sorry, but "SOLVED" is not valid.



  • 9.  RE: VUM failed to authenticate

    Posted Apr 10, 2020 04:58 PM

    It is the decision of the original poster to mark answers as correct or not, as their issue was resolved they chose to mark an answer.

    Feel free to start your own thread or provide additional info so others may help you with an alternate solution.



  • 10.  RE: VUM failed to authenticate

    Posted Apr 17, 2020 12:57 AM

    Alright, makes sense.  That "solved" pertained to this being the final solution, but in his particular case it was.  Thanks.



  • 11.  RE: VUM failed to authenticate

    Posted Dec 15, 2021 12:45 AM

    The below solution helped me fix the issue 

     

    C:\Program Files\VMware\vCenter Server\bin\ service-control --stop vsphere-ui

                                                                                 service-control --start vsphere-ui

     

    Credits to :

    https://noesberger.info/authentication-failed-update-manager-server-could-not-be-contacted/

    Thank you!