Just got this work. If anybody wants to do this, follow the steps. NOT RESPONSIBLE FOR ANY DAMAGES OF ANY KIND This is for a Synology NAS and that you have already installed a SSL on it. You will need SSH enabled and putty.exe to run some commands. You also need notepad++ to edit a file. 1. Stop BTSYNC if it is running in the package manager. 2. Make a copy of your Synology's certificate and key. In putty, login with "root" as the user and the password you use for the admin account. Now run the following commands. The files should automatically have the permissions and owner changed when BTSYNC starts up. cd /usr/syno/etc/sslcp ssl.crt/server.crt /volume1/@appstore/bittorrentsync/var/server.crtcp ssl.key/server.key /volume1/@appstore/bittorrentsync/var/server.key3. Now to change the config to run with HTTPS and have BTSNYC load the SSL files. Still using putty, run the following commands. Change the path if needed, like to the public folder. cd /volume1/@appstore/bittorrentsync/varcp sync.conf /volume1/Downloads/sync.confNow open the file with notepad++, I would make a backup first just to be safe. This is what the file should look like. There may be some slight differences. { "storage_path" : "/usr/local/bittorrentsync/var", "pid_file" : "/usr/local/bittorrentsync/var/syncapp.pid", "display_new_version" : false, "vendor" : "Synology", "webui" : { "listen" : "0.0.0.0:8890", "allow_empty_password" : false, "directory_root" : "/", "dir_whitelist" : ["/volume1","/volume2","/volume3","/volume4","/volume5","/volume6","/volume7","/volume8","/volume9","/volume10","/volume11","/volume12","/volume13","/volume14","/volume15","/volume16","/volume17","/volume18","/volume19","/volume20"], "context":"{\"folder_blacklist\": [\"\/@\", \"\/lost\\\\+found\"]}", "directory_root_policy":"belowroot" }}Now add this right under ""allow_empty_password" : false,". NOTE THE "COMMAS" AT THE END OF EVERY LINE. "force_https" : true,"ssl_certificate" : "/volume1/@appstore/bittorrentsync/var/server.crt","ssl_private_key" : "/volume1/@appstore/bittorrentsync/var/server.key",It should look like this when you are done. { "storage_path" : "/usr/local/bittorrentsync/var", "pid_file" : "/usr/local/bittorrentsync/var/syncapp.pid", "display_new_version" : false, "vendor" : "Synology", "webui" : { "listen" : "0.0.0.0:8890", "allow_empty_password" : false, "force_https" : true, "ssl_certificate" : "/volume1/@appstore/bittorrentsync/var/server.crt", "ssl_private_key" : "/volume1/@appstore/bittorrentsync/var/server.key", "directory_root" : "/", "dir_whitelist" : ["/volume1","/volume2","/volume3","/volume4","/volume5","/volume6","/volume7","/volume8","/volume9","/volume10","/volume11","/volume12","/volume13","/volume14","/volume15","/volume16","/volume17","/volume18","/volume19","/volume20"], "context":"{\"folder_blacklist\": [\"\/@\", \"\/lost\\\\+found\"]}", "directory_root_policy":"belowroot" }}Now save the file and copy it back to its original location. Still using putty, run the following commands. If you changed the path from the previous command you need to change it here too. cd /volume1/Downloadscp -f sync.conf /volume1/@appstore/bittorrentsync/var/sync.confNow start BYSYNC from the package manager. If you get an error, it most likely due to an error in the config file you edited. Double check it and copy it again. If BTSYNC runs, you should now have HTTPS forced and using your SSL certificate. I will try and answer any questions but I don't usually check here. I'm mostly on Synology forums.