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Olekasandr_RupaHi - login to http://www.office.com as a user with access to the admin centre

Once logged in click on the Admin icon

Once the admin centre opens up click on Users > Active Users

Find the user and on the left hand side of the user name click on More Actions (the 3 dots) and select 'Manage Product Licences'

A new tab will open on the right hand side of the screen listing all available licences. One of these will be Teams (depending on your version of office will determine what type of teams licence you have) untick this (if ticked) and retick it (it will go blue).

At the bottom of this tab click Save Changes

It says it can take 24hours for this to be applied but for me it was within the hour.

I hope this helps

Thanks

Mike