diff --git a/backend/crypt/crypt.go b/backend/crypt/crypt.go
index 65664c798..0fec3f013 100644
--- a/backend/crypt/crypt.go
+++ b/backend/crypt/crypt.go
@@ -79,7 +79,9 @@ NB If filename_encryption is "off" then this option will do nothing.`,
 		}, {
 			Name:    "server_side_across_configs",
 			Default: false,
-			Help: `Allow server-side operations (e.g. copy) to work across different crypt configs.
+			Help: `Deprecated: use --server-side-across-configs instead.
+
+Allow server-side operations (e.g. copy) to work across different crypt configs.
 
 Normally this option is not what you want, but if you have two crypts
 pointing to the same backend you can use it.
diff --git a/backend/drive/drive.go b/backend/drive/drive.go
index b07602bb4..059c3cd91 100644
--- a/backend/drive/drive.go
+++ b/backend/drive/drive.go
@@ -499,7 +499,9 @@ need to use --ignore size also.`,
 		}, {
 			Name:    "server_side_across_configs",
 			Default: false,
-			Help: `Allow server-side operations (e.g. copy) to work across different drive configs.
+			Help: `Deprecated: use --server-side-across-configs instead.
+
+Allow server-side operations (e.g. copy) to work across different drive configs.
 
 This can be useful if you wish to do a server-side copy between two
 different Google drives.  Note that this isn't enabled by default
diff --git a/backend/onedrive/onedrive.go b/backend/onedrive/onedrive.go
index aa634b544..36041905d 100644
--- a/backend/onedrive/onedrive.go
+++ b/backend/onedrive/onedrive.go
@@ -196,7 +196,9 @@ listing, set this option.`,
 		}, {
 			Name:    "server_side_across_configs",
 			Default: false,
-			Help: `Allow server-side operations (e.g. copy) to work across different onedrive configs.
+			Help: `Deprecated: use --server-side-across-configs instead.
+
+Allow server-side operations (e.g. copy) to work across different onedrive configs.
 
 This will only work if you are copying between two OneDrive *Personal* drives AND
 the files to copy are already shared between them.  In other cases, rclone will