Directory Exporter fails with "ERROR: [2336-122-33-80040E14] Unable to perform BULK INSERT into d (42542)

Directory Exporter process is very slow and may fail with the following error:

12:05:16 ERROR: [2336-122-33-80040E14] Unable to perform BULK INSERT into database
12:05:16 Open(BULK INSERT FROM '\\SERVERNAME\D$\Program Files\Quest Software\Quest Notes Migrator for Exchange\bulk\T_NMEAddresses-SERVERNAME-3584.tsv' INTO 'T_NMEAddresses'):
12:05:16 Error: Could not allocate space for object 'dbo.SORT temporary run storage: 159910314049536' in database 'tempdb' because the 'PRIMARY' filegroup is full. Create disk space by deleting unneeded files, dropping objects in the filegroup, adding additional files to the filegroup, or setting autogrowth on for existing files in the filegroup.
12:05:16 Error 80040E14

The harddisk on which the SQL database is located runs out of space during the directory export process.
This leads to very slow performance of the Directory Exporter (as the db insert is tried up to five times) and may end up in the whole process failing.

Free neccessary disk space on the harddisk where the SQL database is located or move the SQL database to a location with the neccessary free disk space.