After 2-3 years of constantly hearing and reading biased and polemic anti-Assad reporting and comments in the media of their host countries you could expect the broad majority of Syrian refugees to either abstain from voting or use the event to express their opposition to Assad by explicitly voting for another candidate.
Instead it seems that quite a many refuguees appeared at the voting stations to vote for Assad:

„The massive turnout for the expatriate Syrian vote at the embassy above Beirut produced scenes rarely observed at any embassy or polling station in the world.

At times it turned into a rowdy support rally for the incumbent Bashar al-Assad, with none of the normal election decorum…

The strength and assertiveness of the vote may have reflected an underlying feeling among many Syrians abroad that the tide is running in the regime’s favour, and it is time to climb aboard. “
http://www.bbc.com/news/world-middle-east-27599868