Office 365 Hybrid Configuration Wizard no longer runs with unsupported versions of Exchange

It has always been the case that the only supported patch level for Exchange on-premises – whether Exchange 2010, 2013, 2016 or soon 2019 – is n-1. Meaning that although your Exchange organisation doesn’t need to be bang up-to-date to be supported in a hybrid relationship with Exchange Online, you have to remain effectively within … More Office 365 Hybrid Configuration Wizard no longer runs with unsupported versions of Exchange

Manually setting Free/Busy endpoint for Exchange Hybrid

In a couple of scenarios recently I have come across clients where they have TMG/UAG/ISA in front of their Exchange Hybrid deployment and cannot allow traffic through to their Exchange infrastructure that isn’t pre-authenticated at the reverse proxy. This became a stumbling block most notably for Free/Busy with Exchange Hybrid – which uses Autodiscover to … More Manually setting Free/Busy endpoint for Exchange Hybrid

Warning – Update to Office 365 Certificate could break your Exchange 2013 Hybrid

In a blog post published on 19th February the Exchange Team blog announced that an upcoming certificate renewal for Office 365 on 15th April 2016¬†will¬†break Hybrid mail flow in certain circumstances. These are: If you are running Exchange 2013 CU8 or earlier. You have upgraded to Exchange 2013 CU9 or later, but have not re-run … More Warning – Update to Office 365 Certificate could break your Exchange 2013 Hybrid