You can start a case here with product support.
https://support.serviceshub.microsoft.com/supportforbusiness
--please don't forget to Accept as answer if the reply is helpful--
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Hello. This is Do Kim.
I have sent an request for help regarding technical issue we are experiencing.
(Kritika:REBOOT client publishing by ALLM)
To get faster help, is there be any phone number or quicker contact address?
Thank you
Best Regards
You can start a case here with product support.
https://support.serviceshub.microsoft.com/supportforbusiness
--please don't forget to Accept as answer if the reply is helpful--
Hi,
For your demand, open a support ticket with Microsoft should be a more effective way.
https://support.microsoft.com/en-gb/hub/4343728/support-for-business