Many users seem to set their Personal Note and leave it for a long time. My suggested solution would be:
1. Balloon tip when Personal Note is older than X days to remind user to update it.
2. Server to include configurable client option, or to disable it.
This would encourage the user to update their status regularly and not leave it the same for a period of time.
Logic around OutOfOffice and similar integration to not be affected by note?