Messageware and KB912442 and KB916803 interoperation

This article applies to the following products:
     Messageware OWA Suite 2003




Users granted Editor/Author permission to a shared calendar when creating or updating appointments between August and November 1 receive the following error:

Processing error. Please repeat. (403)




We have worked with Microsoft to investigate the issue which was caused by a code change introduced in KB912442 and KB916803 for Exchange Server 2003. KB916783 exhibits the same behaviour as KB912442 or KB916803.




Contact Microsoft directly and request the hotfix using the case reference below. Information regarding possible workarounds can also be found below.

Case Reference: SRX060830602717
Description: "PRO/Exchange/WebDav/Error 403 Forbidden on Busy status FREE/BUSY"

Note: The fix is available only for Exchange 2003 SP2




If it is not possible to apply the Microsoft hotfix at this time there are two workarounds available.


1.     Assign delegate rights using Microsoft Outlook's Delegates functionality in the Tools\Options menu rather than granting permission on a per folder basis by going to the Properties dialog on the Calendar

2.     Although not recommended, remove Microsoft Exchange security updates KB912442 and KB916803



This article applies to the following products:
     Messageware OWA Suite 2003