Even though Skype reported on their website that it has been blocked in the UAE, it may be related to a hacking incident that affected other countries in the past week. 

The service has also been disrupted in Singapore, India, Pakistan and South Africa.

The Telecommunications Regulatory Authority most recently issued a statement on the matter last week. Skype previously had a license to operate in the UAE so it would be unusual for that to have changed. 

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“(We are) aware of an incident where users will either lose connectivity to the application or may be unable to send or receive messages.”

Microsoft Satement

A hacking group seem to have taken credit for the issue

Skype down by CyberTeam

Hello World !!!#SkypeDown – #SkypeOff – #CyberTeam

— CyberTeam (@_CyberTeam_) June 19, 2017

Skype confirmed on their website that it was blocked in the UAE

More details here . We await to see if this is a UAE imposed a ban or whether it is the result of a hacking incident.