backup permissions

[BPPrpedreschi]

hello to all
is there any way to avoid this error without putting sysadmin to the backup user?

Msg 18799, Level 16, State 1, Procedure sys.sp_MSrepl_backup_start, Line 17 [Batch Start Line 0]
Only users who are members of the following roles can perform this operation: sysadmin fixed server role; dbowner or dbcreator fixed database role in the current database.
Processed 56664 pages for database 'mydatabase', file 'mydatabase' on file 1.
Processed 0 pages for database 'mydatabase', file 'XTP' on file 1.
Processed 95 pages for database 'mydatabase', file 'mydatabase_log' on file 1.
Msg 18799, Level 16, State 1, Procedure sys.sp_MSrepl_backup_complete, Line 17 [Batch Start Line 0]
Only users who are members of the following roles can perform this operation: sysadmin fixed server role; dbowner or dbcreator fixed database role in the current database.
BACKUP DATABASE successfully processed 56759 pages in 1.981 seconds (223.841 MB/sec).

the databases have transactional replication

Regarads