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First check that you have the latest version of Account Manager installed. If this also happens with the latest version, try removing the account you have under Settings -> Accounts in the phones menu and then add it again from there.
All the updates are done through "What's new"
First of all i have to say that sony staff did great job with lollipop upodate. Thanks. But still missing few things like:
1. Wanished update center icon (now i can check for updates only from settings-about-update)
2. Sound, priority and none mode (there should be some kind of icon for ringtones, not only control it by pressing side buttons
3. In backup and restore app should be possibility to backup and restore apps too. Hopefully in next update this features will be involved.
And again, really thanks for this stable update:-)
You have to keep in mind that the app updates aren't released globally at the same time.
Was the clear all option promised?