Issue Update 16 - No mail tabs?

[Tim_Thompson]

I have run update 16 this morning and am now not able to manage the mail settings for my domain.
The mail settings icon is no longer there a and if I change to Power User view there is no mail tab on the left.
Help.

 

[Bitpalast]

Does this FAQ article match the case?
https://support.plesk.com/hc/en-us/articles/213409229-Mail-tab-for-a-domain-is-missing-from-Plesk