Official Microsoft support for DirSync (x64, single forest) and Azure AD sync (multiple forests) ends within a year on April 13th 2017.
The information was only sent by email last week and not everyone will be aware and the only official Microsoft statement I can find is linked below:
Of course end of support does not mean your sync tool of choice will stop functioning – it will happily continue to function, but an upgrade will be needed to ensure it remains in support from next year onward.
So get your upgrade boots on and get Azure AD Connect working which is the replacement for any of the previous sync tools and was released in 2015, the link above has further links for an in-place or swing upgrade – whatever floats your boat (in reality choose the method that suits your organisation, also test it first in non-Production!!!)
Azure AD Connect essentially replaces any of the following you might still be running:
- Azure AD Sync
- Azure AD Connector
- FIM 2012 R2
So seriously consider upgrading this side of Christmas, and not next Easter. You have been informed!