I just updated the post regarding the connection of the 2013 level clients, both Project Professional 2013 as well as the Project Online Desktop Client to reflect some extended dates. I jumped the gun slightly and the message center hasn’t yet been updated – but wanted to get the news out there as we have heard from customers that the February change was coming just too soon for them to make the change.
The dates are not quite finalized – and it may be the end of June rather than the end of August date I have posted – but you will certainly have a few more months to make the change. *** 1/27/17 - Dates finalized - it will be 6/30/2017 ***
The blog post is at https://blogs.technet.microsoft.com/projectsupport/2016/12/15/using-project-online-time-to-be-sure-you-upgrade-the-client-software/ – and I’ll update to final dates shortly and give details of the message center post.