diff --git a/graph/pkg/identity/backend.go b/graph/pkg/identity/backend.go
index 1a71a7b5d08..d230a6b1333 100644
--- a/graph/pkg/identity/backend.go
+++ b/graph/pkg/identity/backend.go
@@ -15,6 +15,9 @@ type Backend interface {
 	// DeleteUser deletes a given user, identified by username or id, from the backend
 	DeleteUser(ctx context.Context, nameOrId string) error
 
+	// UpdateUser applies changes to given user, identified by username or id
+	UpdateUser(ctx context.Context, nameOrId string, user libregraph.User) (*libregraph.User, error)
+
 	GetUser(ctx context.Context, nameOrId string) (*libregraph.User, error)
 	GetUsers(ctx context.Context, queryParam url.Values) ([]*libregraph.User, error)
 
diff --git a/graph/pkg/identity/cs3.go b/graph/pkg/identity/cs3.go
index 5fe0117c889..231107d11dc 100644
--- a/graph/pkg/identity/cs3.go
+++ b/graph/pkg/identity/cs3.go
@@ -30,6 +30,11 @@ func (i *CS3) DeleteUser(ctx context.Context, nameOrID string) error {
 	return errorcode.New(errorcode.NotSupported, "not implemented")
 }
 
+// UpdateUser implements the Backend Interface. It's currently not suported for the CS3 backend
+func (i *CS3) UpdateUser(ctx context.Context, nameOrID string, user libregraph.User) (*libregraph.User, error) {
+	return nil, errorcode.New(errorcode.NotSupported, "not implemented")
+}
+
 func (i *CS3) GetUser(ctx context.Context, userID string) (*libregraph.User, error) {
 	client, err := pool.GetGatewayServiceClient(i.Config.Address)
 	if err != nil {
diff --git a/graph/pkg/identity/ldap.go b/graph/pkg/identity/ldap.go
index e98f8b2ef8b..37868128770 100644
--- a/graph/pkg/identity/ldap.go
+++ b/graph/pkg/identity/ldap.go
@@ -160,6 +160,57 @@ func (i *LDAP) DeleteUser(ctx context.Context, nameOrID string) error {
 	return nil
 }
 
+// UpdateUser implements the Backend Interface. It's currently not suported for the CS3 backedn
+func (i *LDAP) UpdateUser(ctx context.Context, nameOrID string, user libregraph.User) (*libregraph.User, error) {
+	e, err := i.getLDAPUserByNameOrID(nameOrID)
+	if err != nil {
+		return nil, err
+	}
+
+	// Don't allow updates of the ID
+	if user.Id != nil && *user.Id != "" {
+		if e.GetEqualFoldAttributeValue(i.userAttributeMap.id) != *user.Id {
+			return nil, errorcode.New(errorcode.NotAllowed, "changing the UserId is not allowed")
+		}
+	}
+	// TODO: In order to allow updating the user name we'd need to issue a ModRDN operation
+	// As we currently using uid as the naming Attribute for the user entries. (Do we even
+	// want to allow changing the user name?). For now just disallow it.
+	if user.OnPremisesSamAccountName != nil && *user.OnPremisesSamAccountName != "" {
+		if e.GetEqualFoldAttributeValue(i.userAttributeMap.userName) != *user.OnPremisesSamAccountName {
+			return nil, errorcode.New(errorcode.NotSupported, "changing the user name is currently not supported")
+		}
+	}
+
+	mr := ldap.ModifyRequest{DN: e.DN}
+	if user.DisplayName != nil && *user.DisplayName != "" {
+		if e.GetEqualFoldAttributeValue(i.userAttributeMap.displayName) != *user.DisplayName {
+			mr.Replace(i.userAttributeMap.displayName, []string{*user.DisplayName})
+		}
+	}
+	if user.Mail != nil && *user.Mail != "" {
+		if e.GetEqualFoldAttributeValue(i.userAttributeMap.mail) != *user.Mail {
+			mr.Replace(i.userAttributeMap.mail, []string{*user.Mail})
+		}
+	}
+	if user.PasswordProfile != nil && user.PasswordProfile.Password != nil && *user.PasswordProfile.Password != "" {
+		// password are hashed server side there is no need to check if the new password
+		// is actually different from the old one.
+		mr.Replace("userPassword", []string{*user.PasswordProfile.Password})
+	}
+
+	if err := i.conn.Modify(&mr); err != nil {
+		return nil, err
+	}
+
+	// Read	back user from LDAP to get the generated UUID
+	e, err = i.getUserByDN(e.DN)
+	if err != nil {
+		return nil, err
+	}
+	return i.createUserModelFromLDAP(e), nil
+}
+
 func (i *LDAP) getUserByDN(dn string) (*ldap.Entry, error) {
 	searchRequest := ldap.NewSearchRequest(
 		dn, ldap.ScopeBaseObject, ldap.NeverDerefAliases, 1, 0, false,
diff --git a/graph/pkg/identity/ldap/reconnect.go b/graph/pkg/identity/ldap/reconnect.go
index 272a0043e93..b4e868846c8 100644
--- a/graph/pkg/identity/ldap/reconnect.go
+++ b/graph/pkg/identity/ldap/reconnect.go
@@ -180,16 +180,31 @@ func (c ConnWithReconnect) Del(d *ldap.DelRequest) error {
 	return conn.Del(d)
 }
 
-func (c ConnWithReconnect) Modify(*ldap.ModifyRequest) error {
-	return ldap.NewError(ldap.LDAPResultNotSupported, fmt.Errorf("not implemented"))
+func (c ConnWithReconnect) Modify(m *ldap.ModifyRequest) error {
+	conn, err := c.GetConnection()
+	if err != nil {
+		return err
+	}
+
+	return conn.Modify(m)
 }
 
-func (c ConnWithReconnect) ModifyDN(*ldap.ModifyDNRequest) error {
-	return ldap.NewError(ldap.LDAPResultNotSupported, fmt.Errorf("not implemented"))
+func (c ConnWithReconnect) ModifyDN(m *ldap.ModifyDNRequest) error {
+	conn, err := c.GetConnection()
+	if err != nil {
+		return err
+	}
+
+	return conn.ModifyDN(m)
 }
 
-func (c ConnWithReconnect) ModifyWithResult(*ldap.ModifyRequest) (*ldap.ModifyResult, error) {
-	return nil, ldap.NewError(ldap.LDAPResultNotSupported, fmt.Errorf("not implemented"))
+func (c ConnWithReconnect) ModifyWithResult(m *ldap.ModifyRequest) (*ldap.ModifyResult, error) {
+	conn, err := c.GetConnection()
+	if err != nil {
+		return nil, err
+	}
+
+	return conn.ModifyWithResult(m)
 }
 
 func (c ConnWithReconnect) Compare(dn, attribute, value string) (bool, error) {
diff --git a/graph/pkg/service/v0/instrument.go b/graph/pkg/service/v0/instrument.go
index aeb9106f56e..a0fb82542db 100644
--- a/graph/pkg/service/v0/instrument.go
+++ b/graph/pkg/service/v0/instrument.go
@@ -48,3 +48,8 @@ func (i instrument) PostUser(w http.ResponseWriter, r *http.Request) {
 func (i instrument) DeleteUser(w http.ResponseWriter, r *http.Request) {
 	i.next.DeleteUser(w, r)
 }
+
+// PatchUser implements the Service interface.
+func (i instrument) PatchUser(w http.ResponseWriter, r *http.Request) {
+	i.next.PatchUser(w, r)
+}
diff --git a/graph/pkg/service/v0/logging.go b/graph/pkg/service/v0/logging.go
index 2c1a10e17a2..d5ce3373aaf 100644
--- a/graph/pkg/service/v0/logging.go
+++ b/graph/pkg/service/v0/logging.go
@@ -48,3 +48,8 @@ func (l logging) PostUser(w http.ResponseWriter, r *http.Request) {
 func (l logging) DeleteUser(w http.ResponseWriter, r *http.Request) {
 	l.next.DeleteUser(w, r)
 }
+
+// PatchUser implements the Service interface.
+func (l logging) PatchUser(w http.ResponseWriter, r *http.Request) {
+	l.next.PatchUser(w, r)
+}
diff --git a/graph/pkg/service/v0/service.go b/graph/pkg/service/v0/service.go
index 59a2c2f30c6..451cdd872a4 100644
--- a/graph/pkg/service/v0/service.go
+++ b/graph/pkg/service/v0/service.go
@@ -20,6 +20,7 @@ type Service interface {
 	GetUser(http.ResponseWriter, *http.Request)
 	PostUser(http.ResponseWriter, *http.Request)
 	DeleteUser(http.ResponseWriter, *http.Request)
+	PatchUser(http.ResponseWriter, *http.Request)
 }
 
 // NewService returns a service implementation for Service.
@@ -73,6 +74,7 @@ func NewService(opts ...Option) Service {
 				r.Route("/{userID}", func(r chi.Router) {
 					r.Get("/", svc.GetUser)
 					r.Delete("/", svc.DeleteUser)
+					r.Patch("/", svc.PatchUser)
 				})
 			})
 			r.Route("/groups", func(r chi.Router) {
diff --git a/graph/pkg/service/v0/tracing.go b/graph/pkg/service/v0/tracing.go
index 27bbeb817bc..c1e54421451 100644
--- a/graph/pkg/service/v0/tracing.go
+++ b/graph/pkg/service/v0/tracing.go
@@ -44,3 +44,8 @@ func (t tracing) PostUser(w http.ResponseWriter, r *http.Request) {
 func (t tracing) DeleteUser(w http.ResponseWriter, r *http.Request) {
 	t.next.DeleteUser(w, r)
 }
+
+// PatchUser implements the Service interface.
+func (t tracing) PatchUser(w http.ResponseWriter, r *http.Request) {
+	t.next.PatchUser(w, r)
+}
diff --git a/graph/pkg/service/v0/users.go b/graph/pkg/service/v0/users.go
index 254553bb9c8..38df46159dc 100644
--- a/graph/pkg/service/v0/users.go
+++ b/graph/pkg/service/v0/users.go
@@ -124,6 +124,41 @@ func (g Graph) DeleteUser(w http.ResponseWriter, r *http.Request) {
 	render.NoContent(w, r)
 }
 
+// PatchUser implements the Service Interface. Updates the specified attributes of an
+// ExistingUser
+func (g Graph) PatchUser(w http.ResponseWriter, r *http.Request) {
+	nameOrID := chi.URLParam(r, "userID")
+	nameOrID, err := url.PathUnescape(nameOrID)
+	if err != nil {
+		errorcode.InvalidRequest.Render(w, r, http.StatusBadRequest, "unescaping user id failed")
+	}
+
+	if nameOrID == "" {
+		errorcode.InvalidRequest.Render(w, r, http.StatusBadRequest, "missing user id")
+		return
+	}
+	changes := libregraph.NewUser()
+	err = json.NewDecoder(r.Body).Decode(changes)
+	if err != nil {
+		errorcode.InvalidRequest.Render(w, r, http.StatusBadRequest, err.Error())
+		return
+	}
+
+	u, err := g.identityBackend.UpdateUser(r.Context(), nameOrID, *changes)
+	if err != nil {
+		var errcode errorcode.Error
+		if errors.As(err, &errcode) {
+			errcode.Render(w, r)
+		} else {
+			errorcode.GeneralException.Render(w, r, http.StatusInternalServerError, err.Error())
+		}
+	}
+
+	render.Status(r, http.StatusOK)
+	render.JSON(w, r, u)
+
+}
+
 func isNilOrEmpty(s *string) bool {
 	return s == nil || *s == ""
 }