cached exchange mode outlook 365 is not available

Emails can't be received and can't be sent. (This occurs only rarely.In the past couple of days I have had an issue which has appeared on again with some users' Outlook. Someone is creating new cached mode profiles for their mailbox repeatedly.Many users open a shared resource mailbox when Download shared folders is enabled in the Outlook profile.(For example, many users sign in to a mailbox that is used to answer public or service communications.) Many users sign in to the mailbox repeatedly.There are several scenarios in which this situation might occur: Right-click the selected data in the Binary section, and then select Delete.Įxit the MFCMAPI tool, and then start Outlook.

Right-click the data in the Binary section of Property Editor, and then select Select All.

If the value under the Tag column is 0x7C04000A, then right-click PR_OST_OSTID, select Edit as stream, and then select Binary.

If the value under the Tag column is 0x7C040102, then double-click PR_OST_OSTID to open the Property Editor.

If PR_OST_OSTID is found under the Other names column, the value under the Tag column is 0x7C04000A. If it is found under the Property names column, the value under the Tag column is 0x7C040102. You may see PR_OST_OSTID under the Property names column or the Other names column. In the right-side pane, locate the PR_OST_OSTID property. In the navigation pane, expand Root Container, and then select Top of Information Store. Select the Outlook cached mode profile for the mailbox, and then select OK.ĭouble-click the email address that represents the mailbox in question.

Use the MAPI_NO_CACHE flag when calling OpenEntry.

Use the MDB_ONLINE flag when calling OpenMsgStore.Launch Mfcmapi.exe, and then select OK to move through the introduction screen.Įnable the following options, and then select OK: To resolve this problem, remove the data in the PR_OST_OSTID binary property. Eventually, the size of the data in the property exceeds approximately 32,720 bytes, and you start to receive the error. Every time that you create a new cached mode profile for the mailbox, approximately 20 bytes of data is added to this property. This property is located on Top of Information Store in the default store. This problem occurs because the hidden PR_OST_OSTID property in your mailbox is larger than 32 kilobytes (KB). This error message is also displayed when you try to create a new Outlook profile that is configured to use cached mode.

Cached exchange mode outlook 365 is not available