Nginx access lot every minute getting that messages

Hello all,
Am using NC 11.0.1
PHP 7.0.13
nginx 1.10.0
Ubuntu 16.04.1
Kernel 4.4.0-63

Am getting every minute those messages in my nginx access.log.
Is that normal or has it something to do with configuration?

xxx.xxx.xxx.xxx - user[23/Feb/2017:09:52:25 +0100] “PROPFIND /nextcloud/remote.php/webdav/Musik HTTP/1.1” 207 417 “-” "Mozilla/5.0 (Linux) mirall/2.2.4 (Nextcloud)"
xxx.xxx.xxx.xxx - user[23/Feb/2017:09:52:26 +0100] “PROPFIND /nextcloud/remote.php/webdav/Videos HTTP/1.1” 207 418 “-” “Mozilla/5.0 (Linux) mirall/2.2.4 (Nextcloud)”