All my displays show exclamation point today. I’ve done updating layers yesterday and today all of diplays show exclamation point "display are update but not verified by server"
What the problem?
Depending on the collection interval setting, once your displays connect to the CMS, the (!) should be gone (and hopefully checkmark should be in status).
If there is some connection issues between players and CMS, then you might want to check logs for more details.