diff --git a/resources/templates/provision/yealink/t42s/{$mac}.cfg b/resources/templates/provision/yealink/t42s/{$mac}.cfg
index 21832f7ee6..0ebbbe5391 100644
--- a/resources/templates/provision/yealink/t42s/{$mac}.cfg
+++ b/resources/templates/provision/yealink/t42s/{$mac}.cfg
@@ -516,7 +516,11 @@ account.2.label = {$account.2.display_name}
 account.2.display_name = {$account.2.display_name}
 account.2.auth_name = {$account.2.auth_id}
 account.2.password = {$account.2.password}
+{if isset($account.2.server.1.address)}
+account.2.user_name = {$account.2.user_id}@{$account.2.server_address}
+{else}
 account.2.user_name = {$account.2.user_id}
+{/if}
 account.2.sip_server_host = {$account.2.server_address}
 account.2.sip_server_port = {$account.2.sip_port}
 account.2.outbound_host = {$account.2.outbound_proxy}
@@ -1032,7 +1036,11 @@ account.3.label = {$account.3.display_name}
 account.3.display_name = {$account.3.display_name}
 account.3.auth_name = {$account.3.auth_id}
 account.3.password = {$account.3.password}
+{if isset($account.3.server.1.address)}
+account.3.user_name = {$account.3.user_id}@{$account.3.server_address}
+{else}
 account.3.user_name = {$account.3.user_id}
+{/if}
 account.3.sip_server_host = {$account.3.server_address}
 account.3.sip_server_port = {$account.3.sip_port}
 account.3.outbound_host = {$account.3.outbound_proxy}
@@ -1531,7 +1539,11 @@ account.4.label = {$account.4.display_name}
 account.4.display_name = {$account.4.display_name}
 account.4.auth_name = {$account.4.auth_id}
 account.4.password = {$account.4.password}
+{if isset($account.4.server.1.address)}
+account.4.user_name = {$account.4.user_id}@{$account.4.server_address}
+{else}
 account.4.user_name = {$account.4.user_id}
+{/if}
 account.4.sip_server_host = {$account.4.server_address}
 account.4.sip_server_port = {$account.4.sip_port}
 account.4.outbound_host = {$account.4.outbound_proxy}
@@ -2025,7 +2037,11 @@ account.5.label = {$account.5.display_name}
 account.5.display_name = {$account.5.display_name}
 account.5.auth_name = {$account.5.auth_id}
 account.5.password = {$account.5.password}
+{if isset($account.5.server.1.address)}
+account.5.user_name = {$account.5.user_id}@{$account.5.server_address}
+{else}
 account.5.user_name = {$account.5.user_id}
+{/if}
 account.5.sip_server_host = {$account.5.server_address}
 account.5.sip_server_port = {$account.5.sip_port}
 account.5.outbound_host = {$account.5.outbound_proxy}
@@ -2519,7 +2535,11 @@ account.6.label = {$account.6.display_name}
 account.6.display_name = {$account.6.display_name}
 account.6.auth_name = {$account.6.auth_id}
 account.6.password = {$account.6.password}
+{if isset($account.6.server.1.address)}
+account.6.user_name = {$account.6.user_id}@{$account.6.server_address}
+{else}
 account.6.user_name = {$account.6.user_id}
+{/if}
 account.6.sip_server_host = {$account.6.server_address}
 account.6.sip_server_port = {$account.6.sip_port}
 account.6.outbound_host = {$account.6.outbound_proxy}