AD Collector module logs an error: IsFailed to parse ProxyAddress (4307425)

Issue
The Archive Shuttle Active Directory (AD) Collector module may log the following error:

2016-04-12 17:00:23Z|7800| 22|ERROR| AddOrUpdateProxyAddress|IsFailed to parse ProxyAddress [FAX:XXXXXXXXXXXXX]
2016-04-12 17:00:23Z|7800| 55|ERROR| AddOrUpdateProxyAddress|IsFailed to parse ProxyAddress [MS:XXXXX/XXXX/XXXXXX]
2016-04-12 17:00:23Z|7800| 55|ERROR| AddOrUpdateProxyAddress|IsFailed to parse ProxyAddress [FACSYS:XXXXXX.XXXXXXX@]
2016-04-12 17:00:23Z|7800| 22|ERROR| AddOrUpdateProxyAddress|IsFailed to parse ProxyAddress [EUM:XXX.XXX@XXXX.com;phone-context=XXXXXXX.XXXXX.com]

Solution
The error can be ignored. Archive Shuttle only stores information about SMTP addresses and not the other proxy addresses.