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I am attempting to use Outlook on my android phone. When I attempt to add my email account to outlook (on my phone) I get an error that says: Your mail certificate is invalid. Would you like to login anyway. PLEASE HELP!!!!
Using Outlook for Android in business environments for email and scheduling
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This would be down to ISps to do this, not indivual users. Talktalk is not my ISP, but my email is Tiscali, which I have and have had when I was with Tiscali ISP, but they were taken over by tallktalk.
I had a chat with Microsoft regarding this yesterday. They have dropped support for TLS1.0 and 1.1 and are requiring TLS 1.2 if you want to use the app. I am currently in process of bringing up a new 2008 R2 server to move my web facing traffic to, you can have multiple CAS servers so you do not have to remove/delete/decommission your existing, just add a new web facing server to take the role of internet facing owa/activesync/outlook anywhere (if you have it).
Have been messaging talktalk via Twitter, not got very far so far, was asked whether I can log-in to my mail via webmail, will keep people updated of any further development if I get any, as Microsoft say providers need to update to TSL 1.2, let us see if they do. I have tweeted them the link to this thread, by the way.
Did not solve it for me either, but Microsoft know, as I have been writing to them and given them the settings for my ISP.
I have also tried rebooting servers and phones, no luck.
Is anyone else having issues with the iPhone native email client? It started last night for us, users are complaining about their messages downloading over and over and re-syncing their inbox.