Index: lams_admin/conf/language/lams/ApplicationResources.properties
===================================================================
diff -u -reba4bfd253009e2910ee42d7852a05004f14b26d -re275beec5359edfddeab1b17564db7736c5ead0d
--- lams_admin/conf/language/lams/ApplicationResources.properties	(.../ApplicationResources.properties)	(revision eba4bfd253009e2910ee42d7852a05004f14b26d)
+++ lams_admin/conf/language/lams/ApplicationResources.properties	(.../ApplicationResources.properties)	(revision e275beec5359edfddeab1b17564db7736c5ead0d)
@@ -664,3 +664,4 @@
 tool.groups.remove.confirm = Are you sure you want to remove this group?
 tool.groups.group.name.error = A group name can not be blank
 tool.groups.save.error = Error while saving groups
+config.login.as.enable = Enable Login-as feature for administrators
\ No newline at end of file
Index: lams_admin/web/usersearchlist.jsp
===================================================================
diff -u -r05c00f92856ef13cd90d6fce06acb069418c2512 -re275beec5359edfddeab1b17564db7736c5ead0d
--- lams_admin/web/usersearchlist.jsp	(.../usersearchlist.jsp)	(revision 05c00f92856ef13cd90d6fce06acb069418c2512)
+++ lams_admin/web/usersearchlist.jsp	(.../usersearchlist.jsp)	(revision e275beec5359edfddeab1b17564db7736c5ead0d)
@@ -4,6 +4,7 @@
 <c:set var="lams"><lams:LAMSURL /></c:set>
 <c:set var="useInternalSMTPServer"><lams:Configuration key="InternalSMTPServer"/></c:set>
 <c:set var="smtpServer"><lams:Configuration key="SMTPServer"/></c:set>
+<c:set var="loginAsEnable"><lams:Configuration key="LoginAsEnable"/></c:set>
 
 <lams:html>
 <lams:head>
@@ -95,10 +96,12 @@
 								rows += 	'&nbsp;';
 								rows +=     '<form style="display: inline-block;" id="delete_' + orgData["userId"] +'" method="post" action="/lams/admin/user/edit.do"><input type="hidden" name="userId" value="' + orgData["userId"] + '"/><input type="hidden" name="<csrf:tokenname/>" value="<csrf:tokenvalue/>"/><button class="btn btn-primary btn-xs" type="submit"><i class="fa fa-pencil"/> <span class="hidden-xs hidden-sm"><fmt:message key="admin.edit"/></span></button></form>';
 								rows += 	'&nbsp;';
+								<c:if test="${loginAsEnable eq 'true'}">
 								rows += 	'<a title="<fmt:message key="label.login.as"/>" href="<lams:LAMSURL/>loginas.do?login=' + orgData["login"] + '" id="loginAs' + orgData["userId"] +'">';
 								rows += 		'<button type="button" class="btn btn-primary btn-xs"><i class="fa fa-sign-in"/><span class="hidden-xs hidden-sm"> <fmt:message key="label.login.as"/></span></button>';
 								rows += 	'</a>';
 								rows += 	'&nbsp;';
+								</c:if>
 	
 								if (${(useInternalSMTPServer || not empty smtpServer)} && orgData["email"] != null && orgData["email"] != "") {
 								rows += 	'<a title="<fmt:message key="label.email"/>" href="<lams:LAMSURL/>emailUser/composeMail.do?returnUrl=/lams/admin/usersearch.do&userID=' + orgData["userId"] + '">';
Index: lams_central/src/java/org/lamsfoundation/lams/web/LoginAsController.java
===================================================================
diff -u -r29a37489a63e5a95f42a5ef5fd8a7daeb65c53c5 -re275beec5359edfddeab1b17564db7736c5ead0d
--- lams_central/src/java/org/lamsfoundation/lams/web/LoginAsController.java	(.../LoginAsController.java)	(revision 29a37489a63e5a95f42a5ef5fd8a7daeb65c53c5)
+++ lams_central/src/java/org/lamsfoundation/lams/web/LoginAsController.java	(.../LoginAsController.java)	(revision e275beec5359edfddeab1b17564db7736c5ead0d)
@@ -67,7 +67,7 @@
     public String execute(HttpServletRequest request) throws Exception {
 	String login = WebUtil.readStrParam(request, "login", false);
 
-	if (userManagementService.isUserSysAdmin()) {
+	if (userManagementService.isUserSysAdmin() && Configuration.getAsBoolean(ConfigurationKeys.LOGIN_AS_ENABLE)) {
 	    if ((login != null) && (login.trim().length() > 0)) {
 		User user = userManagementService.getUserByLogin(login);
 		if (user != null) {
Index: lams_common/src/java/org/lamsfoundation/lams/dbupdates/patch20211025.sql
===================================================================
diff -u
--- lams_common/src/java/org/lamsfoundation/lams/dbupdates/patch20211025.sql	(revision 0)
+++ lams_common/src/java/org/lamsfoundation/lams/dbupdates/patch20211025.sql	(revision e275beec5359edfddeab1b17564db7736c5ead0d)
@@ -0,0 +1,17 @@
+-- Turn off autocommit, so nothing is committed if there is an error
+SET AUTOCOMMIT = 0;
+SET FOREIGN_KEY_CHECKS=0;
+-- Put all sql statements below here
+
+--LDEV-5253 Make Login As feature configurable
+
+INSERT INTO lams_configuration (config_key, config_value, description_key, header_name, format, required) 
+VALUES ('LoginAsEnable', 'true', 'config.login.as.enable', 'config.header.privacy.settings', 'BOOLEAN', 1);
+
+
+-- Put all sql statements above here
+
+-- If there were no errors, commit and restore autocommit to on
+COMMIT;
+SET AUTOCOMMIT = 1;
+SET FOREIGN_KEY_CHECKS=1;
Index: lams_common/src/java/org/lamsfoundation/lams/util/ConfigurationKeys.java
===================================================================
diff -u -rd4e455d6806b6c48cca0b6e8ee87f256a92f123a -re275beec5359edfddeab1b17564db7736c5ead0d
--- lams_common/src/java/org/lamsfoundation/lams/util/ConfigurationKeys.java	(.../ConfigurationKeys.java)	(revision d4e455d6806b6c48cca0b6e8ee87f256a92f123a)
+++ lams_common/src/java/org/lamsfoundation/lams/util/ConfigurationKeys.java	(.../ConfigurationKeys.java)	(revision e275beec5359edfddeab1b17564db7736c5ead0d)
@@ -328,4 +328,7 @@
     public static String ETHERPAD_SERVER_URL = "EtherpadServerUrl";
     public static String ETHERPAD_API_KEY = "EtherpadApiKey";
     public static String ETHERPAD_INSTANCE_ID = "EtherpadInstanceID";
+
+    // LDEV-5253 Make Login As feature configurable
+    public static String LOGIN_AS_ENABLE = "LoginAsEnable";
 }
\ No newline at end of file