I've googled on this to no avail so am hoping that someone else here may have seen this.
In checking my network traffic connections just now I came across a situation where a workstation at one of our remote sites is connecting to the server across port 38870 via the application MAPI-PREOP. I'm not finding much information online about this port and am concerned that I may have a possible security issue. The workstation is XP pro SP2 with the latest updates and McAfee virus catalog. The server is SBS 2003, also with the latest updates.
Please advise. I could just block this port to see what breaks but would prefer to know in advance what it might impact.