Currently running Exchange 2003 and 2010. I have migrated all users to 2010. If we try to use the share calendar feature in Outlook 2010 to send an email we receive this error, but only if cached mode is selected. User@company.com cannot be found. Remove user@company.com from the Folder Permissions on this folder, and then try sending the sharing message again. After following the instructions and receivng the same message on others trying, I immediately turned to the OAB, the only weird thing is that his primary email address is user@companyb.com on the exchange server but the OAB shows SMTP:user@company.com and smtp:user@companyb.com. I am assuming that captial SMTP is the primary in Outlook because when I am not in cached mode it shows SMTP:user@companyb.com. I have deleted the OAB on my pc and downloaded a new one but am still having that problem. I also went on Exchange 2010 and right clicked the OAB and selected Update. I enabled expert logging but only got one error that states: OABGen could not generate full details for some entries in the offline address list for address list '\Global Address List'. To see which entries are affected, set event logging for the offline address list generator to at least medium. I went through the logs and found that it was able to read the user: OALGen truncated or dropped properties for entry 'User (FirstName LastName)' in address list '\Global Address List' because they exceeded the configured size limits for the version 4 offline address list. The affected MAPI ids are: 8008. Looked this up and realized that it is referring to truncating the memberOf group items. I am stuck, any suggestions? Jamie Fisher

Hi, It seems there is something wrong with OABGen. Now the issue is you can’t send an email to share calendar. As a workaround, I would like to bypass the process. 1. Modify the permission to the calendar, add User into the permission list, and grant appropriate permission to user. 2. User accesses the calendar via this method. Click “File”à Click “Open”à Click “Other user’s folder”à input the alias and choose the folder. Workaround 2: When you are required to send an email to share the calendar, input the email address “User@companyb.com” manually.