For all Hybrid O365 Exchange environments, Microsoft has released a blog post stating that come April, they will be updating their TLS certificate for Office 365.
If you are a Hybrid environment, this will affect your Office 365 Hybrid if you have Exchange 2013 with certain CU levels. It is highly important that you understand what can happen if you do not follow the steps outlined in the blog below. You may have a complete drop in functionality of your Hybrid.
To see the blog that we are referencing, click HERE.
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