ERROR: [4970-108-48-00000000] Unable to open mailbox for user 'username@domain.com' (4209522)

ERROR: [4970-108-48-00000000] Unable to open mailbox for user 'username@domain.com'

User not found in Global Address List

Resolution 1:

1- Verify the user is not hidden in GAL.

2- Verfiy the user could be found manually in GAL and the Offline AddressBook.

3- Verify cache mode is not enabled in the Outlook profile.

4- Verify the user is mailbox-enabled with the correct primary SMTP address that NME is looking for, which can be found on the Export Notes Directory screen in the SMTP Address column.

5- Temporarily disable the mailbox

6- Re-enable the mailbox

7- Run another migration

Resolution 2:

In some larger organizations there can be users with similar SMTP addresses in the Exchange GAL. For example, the following two users could exist in the Exchange GAL:

testuser1@domain.com
testuser1@domain.com.se

In this case, the two SMTP addresses represent two completely different users in different countries that both have a similar SMTP address. NME version 4.7.0.110 and later have been enhanced to provide better handling of users with similar SMTP addresses in the Exchange GAL.