Hi @Petrov Mikhail Thanks for your feedback above which shared more information and glad to know that your issue is resolved now! Since our forum has the policy that The question author cannot accept their own answer. They can only accept answers by others, and according to the scenario introduced here: Answering your own questions on Microsoft Q&A
I would make a brief summary of this post so that other forum members could easily find useful information here:
[Skype for business does not work - Summary]
Issue Symptom:
iOS 15.8.1 iPhone SE 1st gen Skype for business 6.30.0 The Skype does not work after the upgrade. The app starts and then closes itself.
Solution:
The reason was the Intune program. Skype stopped working after updating Intune to version 5.5401.0. We removed Intune and Skype started working.
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