Using Outlook for Android in business environments for email and scheduling
Personally I wouldn't thank them unless there is proof they have done anything. It could be that TalkTalk have amended their cipher set to "accommodate" this.
Besides Outlook for Android has SO many issues still- after tweaking the notifications sounds within Outlook for Andoid (I have four email accounts in it) notifications on at least one appear to have stopped working all together! Most of yesterday it kept repeating notifications for emails read HOURS ago. This is despite using the only two options available - Reset Account and removing it and re-adding it. Outlook 2016 (version 1806) on my main PC had no such issues.
Garbage app