During migration from Exchange 2003 to 2007 we had the problem with Outlook 2007 client free busy response was slow , about 10 seconds to load . To fix it . Open registry editor on your Desktop(where outlook is installed) Navigate to the following path : HKEY_CURRENT_USERSoftwareMicrosoftOffice12.0OutlookOptionsCalendar Create new DWORD value named UseLegacyFB and set value to 1 Note: 0 or not set will use default outlook settings 1 will use Public Folder based Free/Busy Read more

You receive a meeting and see a small note that meeting is not in your calendar To fix the problem do the following. Close your outlook and search your computer for FRMCACHE.DAT file. Make sure to select hidden and system files. Delete it. Restart Outlook. Outlook should rebuild FRMCACHE.DAT file. Other option is to to run outlook.exe /cleanreminders command line switch . To see other command line switches look at Outlook command line switches. Read more

To cleanup your calendar size you can delete old meetings and meetings with attachments. navigate to your calendar. Press on View and chose “all appointments”   Chose those that you’d like to delete. Read more

Full list of Microsoft  Outlook 2003 command line switches and parameters /a - Creates an item with the specified file as an attachment. Example: "C:Program FilesMicrosoft OfficeOffice11Outlook.exe" /a "C:My Documentslabels.doc" /altvba otmfilename - Opens the VBA program specified in otmfilename, rather than %appdata%MicrosoftOutlookVbaProject.OTM. /c messageclass - Creates a new item of the specified message class (Outlook forms or any other valid MAPI form). Examples: * /c ipm.activity Read more

Show received meetings as tentative: Meetings are automatically placed on the calendar as tentative, so that timeslots will not be overbooked. As meeting updates come in, prior updates are marked "out of date" and are automatically deleted. This means that meeting updates are not accepted in an out of order fashion keeping your calendar items current." You can stop/start the automatic addition of a tentative meeting when meeting request e-mail is received in Outlook by clearing/marking the check Read more

Rescheduling Outlook Calendar Meetings creates duplicate meetings Scenario: 1.       Meeting request comes in. 2.       User accepts. 3.        Meeting shows as accepted in calendar. 4.        An update comes in. 5.       User accepts. 6.        Now there are TWO meetings: The new one and the old one. I found a workaround, but I believe that MS will release fix for this issue. Go to TOOLS > OPTIONS > PREFERENCES > EMAIL OPTIONS > TRACKING Read more

User can't receive meeting requests ,updates and cancellations in exchange 2003/2007 However user can send and receive emails. It can happen if users legacyExchangeDN attribute is wrong. In order to fix the problem Open ADSIedit.msc Open Domains, dc=domain,dc=com , double click on problematic user. And confirm if parameter '/cn=' after '/cn=Recipients'. Is missing Ms Article regarding Exchange 2007 http://support.microsoft.com/kb/556074 Ms Article regarding Exchange 2003 http://support.microsoft.com/kb/556073 Also Read more