I have a UC520 with various mailboxes locking up. All I have to do is open 10.1.10.1 and unlock the mailbox and all is ok. Next week it could be a different mailbox. These are my versions, software pack: 8.6.0Ios image: uc500-advipservicesk9-mz.151-4...

We have the proper NTP server IP programmed on the gateway and on the Publisher. The phones are still showing a 3 minute difference with the Publisher. Any suggestions