diff --git a/management/server/group.go b/management/server/group.go
index 86bc0d8a0..487cb6d97 100644
--- a/management/server/group.go
+++ b/management/server/group.go
@@ -202,35 +202,45 @@ func (am *DefaultAccountManager) CreateGroups(ctx context.Context, accountID, us
 	}
 
 	var eventsToStore []func()
-	var groupsToSave []*types.Group
 	var updateAccountPeers bool
 
-	err = am.Store.ExecuteInTransaction(ctx, func(transaction store.Store) error {
-		groupIDs := make([]string, 0, len(groups))
-		for _, newGroup := range groups {
+	var globalErr error
+	groupIDs := make([]string, 0, len(groups))
+	for _, newGroup := range groups {
+		err = am.Store.ExecuteInTransaction(ctx, func(transaction store.Store) error {
 			if err = validateNewGroup(ctx, transaction, accountID, newGroup); err != nil {
 				return err
 			}
 
 			newGroup.AccountID = accountID
-			groupsToSave = append(groupsToSave, newGroup)
+
+			if err = transaction.CreateGroup(ctx, newGroup); err != nil {
+				return err
+			}
+
+			err = transaction.IncrementNetworkSerial(ctx, accountID)
+			if err != nil {
+				return err
+			}
+
 			groupIDs = append(groupIDs, newGroup.ID)
 
 			events := am.prepareGroupEvents(ctx, transaction, accountID, userID, newGroup)
 			eventsToStore = append(eventsToStore, events...)
-		}
 
-		updateAccountPeers, err = areGroupChangesAffectPeers(ctx, transaction, accountID, groupIDs)
+			return nil
+		})
 		if err != nil {
-			return err
+			log.WithContext(ctx).Errorf("failed to update group %s: %v", newGroup.ID, err)
+			if len(groupIDs) == 1 {
+				return err
+			}
+			globalErr = errors.Join(globalErr, err)
+			// continue updating other groups
 		}
+	}
 
-		if err = transaction.CreateGroups(ctx, accountID, groupsToSave); err != nil {
-			return err
-		}
-
-		return transaction.IncrementNetworkSerial(ctx, accountID)
-	})
+	updateAccountPeers, err = areGroupChangesAffectPeers(ctx, am.Store, accountID, groupIDs)
 	if err != nil {
 		return err
 	}
@@ -243,7 +253,7 @@ func (am *DefaultAccountManager) CreateGroups(ctx context.Context, accountID, us
 		am.UpdateAccountPeers(ctx, accountID)
 	}
 
-	return nil
+	return globalErr
 }
 
 // UpdateGroups updates groups in the account.
@@ -260,35 +270,45 @@ func (am *DefaultAccountManager) UpdateGroups(ctx context.Context, accountID, us
 	}
 
 	var eventsToStore []func()
-	var groupsToSave []*types.Group
 	var updateAccountPeers bool
 
-	err = am.Store.ExecuteInTransaction(ctx, func(transaction store.Store) error {
-		groupIDs := make([]string, 0, len(groups))
-		for _, newGroup := range groups {
+	var globalErr error
+	groupIDs := make([]string, 0, len(groups))
+	for _, newGroup := range groups {
+		err = am.Store.ExecuteInTransaction(ctx, func(transaction store.Store) error {
 			if err = validateNewGroup(ctx, transaction, accountID, newGroup); err != nil {
 				return err
 			}
 
 			newGroup.AccountID = accountID
-			groupsToSave = append(groupsToSave, newGroup)
-			groupIDs = append(groupIDs, newGroup.ID)
+
+			if err = transaction.UpdateGroup(ctx, newGroup); err != nil {
+				return err
+			}
+
+			err = transaction.IncrementNetworkSerial(ctx, accountID)
+			if err != nil {
+				return err
+			}
 
 			events := am.prepareGroupEvents(ctx, transaction, accountID, userID, newGroup)
 			eventsToStore = append(eventsToStore, events...)
-		}
 
-		updateAccountPeers, err = areGroupChangesAffectPeers(ctx, transaction, accountID, groupIDs)
+			groupIDs = append(groupIDs, newGroup.ID)
+
+			return nil
+		})
 		if err != nil {
-			return err
+			log.WithContext(ctx).Errorf("failed to update group %s: %v", newGroup.ID, err)
+			if len(groups) == 1 {
+				return err
+			}
+			globalErr = errors.Join(globalErr, err)
+			// continue updating other groups
 		}
+	}
 
-		if err = transaction.UpdateGroups(ctx, accountID, groupsToSave); err != nil {
-			return err
-		}
-
-		return transaction.IncrementNetworkSerial(ctx, accountID)
-	})
+	updateAccountPeers, err = areGroupChangesAffectPeers(ctx, am.Store, accountID, groupIDs)
 	if err != nil {
 		return err
 	}
@@ -301,7 +321,7 @@ func (am *DefaultAccountManager) UpdateGroups(ctx context.Context, accountID, us
 		am.UpdateAccountPeers(ctx, accountID)
 	}
 
-	return nil
+	return globalErr
 }
 
 // prepareGroupEvents prepares a list of event functions to be stored.
@@ -584,13 +604,6 @@ func validateNewGroup(ctx context.Context, transaction store.Store, accountID st
 		newGroup.ID = xid.New().String()
 	}
 
-	for _, peerID := range newGroup.Peers {
-		_, err := transaction.GetPeerByID(ctx, store.LockingStrengthNone, accountID, peerID)
-		if err != nil {
-			return status.Errorf(status.InvalidArgument, "peer with ID \"%s\" not found", peerID)
-		}
-	}
-
 	return nil
 }
 
diff --git a/management/server/user.go b/management/server/user.go
index 4596ee95b..e5a4dbcea 100644
--- a/management/server/user.go
+++ b/management/server/user.go
@@ -519,33 +519,46 @@ func (am *DefaultAccountManager) SaveOrAddUsers(ctx context.Context, accountID,
 		initiatorUser = result
 	}
 
-	err = am.Store.ExecuteInTransaction(ctx, func(transaction store.Store) error {
-		for _, update := range updates {
-			if update == nil {
-				return status.Errorf(status.InvalidArgument, "provided user update is nil")
-			}
+	var globalErr error
+	for _, update := range updates {
+		if update == nil {
+			return nil, status.Errorf(status.InvalidArgument, "provided user update is nil")
+		}
 
+		err = am.Store.ExecuteInTransaction(ctx, func(transaction store.Store) error {
 			userHadPeers, updatedUser, userPeersToExpire, userEvents, err := am.processUserUpdate(
 				ctx, transaction, groupsMap, accountID, initiatorUserID, initiatorUser, update, addIfNotExists, settings,
 			)
 			if err != nil {
 				return fmt.Errorf("failed to process update for user %s: %w", update.Id, err)
 			}
-			usersToSave = append(usersToSave, updatedUser)
-			addUserEvents = append(addUserEvents, userEvents...)
-			peersToExpire = append(peersToExpire, userPeersToExpire...)
 
 			if userHadPeers {
 				updateAccountPeers = true
 			}
+
+			err = transaction.SaveUser(ctx, updatedUser)
+			if err != nil {
+				return fmt.Errorf("failed to save updated user %s: %w", update.Id, err)
+			}
+
+			usersToSave = append(usersToSave, updatedUser)
+			addUserEvents = append(addUserEvents, userEvents...)
+			peersToExpire = append(peersToExpire, userPeersToExpire...)
+
+			return nil
+		})
+		if err != nil {
+			log.WithContext(ctx).Errorf("failed to save user %s: %s", update.Id, err)
+			if len(updates) == 1 {
+				return nil, err
+			}
+			globalErr = errors.Join(globalErr, err)
+			// continue when updating multiple users
 		}
-		return transaction.SaveUsers(ctx, usersToSave)
-	})
-	if err != nil {
-		return nil, err
 	}
 
-	var updatedUsersInfo = make([]*types.UserInfo, 0, len(updates))
+	var updatedUsersInfo = make([]*types.UserInfo, 0, len(usersToSave))
 
 	userInfos, err := am.GetUsersFromAccount(ctx, accountID, initiatorUserID)
 	if err != nil {
@@ -578,7 +591,7 @@ func (am *DefaultAccountManager) SaveOrAddUsers(ctx context.Context, accountID,
 		am.UpdateAccountPeers(ctx, accountID)
 	}
 
-	return updatedUsersInfo, nil
+	return updatedUsersInfo, globalErr
 }
 
 // prepareUserUpdateEvents prepares a list user update events based on the changes between the old and new user data.
@@ -643,7 +656,7 @@ func (am *DefaultAccountManager) processUserUpdate(ctx context.Context, transact
 	}
 	transferredOwnerRole = result
 
-	userPeers, err := transaction.GetUserPeers(ctx, store.LockingStrengthUpdate, updatedUser.AccountID, update.Id)
+	userPeers, err := transaction.GetUserPeers(ctx, store.LockingStrengthNone, updatedUser.AccountID, update.Id)
 	if err != nil {
 		return false, nil, nil, nil, err
 	}