Then you will need to give your domain account permission on the archives you wish to search, archive, restore, etc..
1. Open the VAC (Vault Admin Console).
2. Expand Archives => Exchange Mailbox.
3. In the right hand pane, select the user whose vault is to be accessed, Right Click and select "Properties".
4. Click on the "Permissions" tab.
5. Click on the "Add" button and select the user(s) and/or Group(s) to add to view this vault and Click "OK".
Or use evpm
This can be achieved by creating an EVPM script, specifying the particular details and running it against the affected archive.
Modify the script below to match the particular DirectoryComputerName, SiteName and mailbox distinguished name.
Edit the file in Notepad and save in UNICODE format, with an .ini extension.
[Directory]
DirectoryComputerName=kvsvault
SiteName=archivesite
[ArchivePermissions]
ArchiveName = john doe
GrantAccess = read write delete, ourdomain\smith
ArchiveName
Mandatory. Identifies the archive to which the permission settings are applied.
If there are multiple folders with the same name and you specify a name, Policy Manager modifies only the first one that it finds. In this case, you must use archive IDs to specify the archives.
Possible values:
The name of an archive
An archive ID
ALL (permissions are applied to all journal, shared, and mailbox archives in the specified vault site)
ALL_JOURNAL (permissions are applied to all journal archives)
ALL_SHARED (permissions are applied to all shared archives)
ALL_MAILBOX (permissions are applied to all mailbox archives)
GrantAccess
Optional. Grants to the specified Windows accounts the specified access to the archive.
The new values supplement any existing access rights. You can have many occurrences of GrantAccess within the same [ArchivePermissions] section.
Possible values:
A list of permissions, followed by a comma and then a comma-delimited list of groups or accounts that are granted the specified permissions. Permissions can be any of read, write, and delete, followed by a comma. For example, to grant read and write access to ourdomain\smith:
GrantAccess = read write, ourdomain\smith
Refer to the policy manager to obtain more information on using EVPM