diff --git a/src/components/NewConversationDialog/NewConversationContactsPage.vue b/src/components/NewConversationDialog/NewConversationContactsPage.vue
index c48b661b158..6ba0b1f7a6b 100644
--- a/src/components/NewConversationDialog/NewConversationContactsPage.vue
+++ b/src/components/NewConversationDialog/NewConversationContactsPage.vue
@@ -76,6 +76,7 @@ import DialpadPanel from '../UIShared/DialpadPanel.vue'
 import TransitionWrapper from '../UIShared/TransitionWrapper.vue'
 
 import { useArrowNavigation } from '../../composables/useArrowNavigation.js'
+import { SHARE } from '../../constants.js'
 import { autocompleteQuery } from '../../services/coreService.ts'
 import CancelableRequest from '../../utils/cancelableRequest.js'
 
@@ -208,7 +209,11 @@ export default {
 				const { request, cancel } = CancelableRequest(autocompleteQuery)
 				this.cancelSearchPossibleConversations = cancel
 
-				const response = await request({ searchText: this.searchText })
+				const response = await request({
+					searchText: this.searchText,
+					token: 'new',
+					forceTypes: [SHARE.TYPE.EMAIL], // e-mail guests are allowed directly after conversation creation
+				})
 
 				this.searchResults = response?.data?.ocs?.data || []
 				if (this.searchResults.length === 0) {
diff --git a/src/components/NewConversationDialog/NewConversationDialog.vue b/src/components/NewConversationDialog/NewConversationDialog.vue
index 3d9d880200e..7c4ac3cc64d 100644
--- a/src/components/NewConversationDialog/NewConversationDialog.vue
+++ b/src/components/NewConversationDialog/NewConversationDialog.vue
@@ -109,6 +109,7 @@ import { provide, ref } from 'vue'
 import AlertCircle from 'vue-material-design-icons/AlertCircle.vue'
 import Check from 'vue-material-design-icons/Check.vue'
 
+import { showSuccess } from '@nextcloud/dialogs'
 import { t } from '@nextcloud/l10n'
 
 import NcButton from '@nextcloud/vue/dist/Components/NcButton.js'
@@ -121,7 +122,7 @@ import LoadingComponent from '../LoadingComponent.vue'
 
 import { useId } from '../../composables/useId.ts'
 import { useIsInCall } from '../../composables/useIsInCall.js'
-import { CONVERSATION } from '../../constants.js'
+import { ATTENDEE, CONVERSATION } from '../../constants.js'
 import { setConversationPassword } from '../../services/conversationsService.js'
 import { addParticipant } from '../../services/participantsService.js'
 import { copyConversationLinkToClipboard } from '../../utils/handleUrl.ts'
@@ -328,6 +329,11 @@ export default {
 				}
 
 				await Promise.all(promises)
+
+				this.selectedParticipants.filter(participant => participant?.source === ATTENDEE.ACTOR_TYPE.EMAILS)
+					.forEach(participant => {
+						showSuccess(t('spreed', 'Invitation was sent to {actorId}', { actorId: participant.id }))
+					})
 			} catch (exception) {
 				console.error('Error creating new conversation: ', exception)
 				this.isLoading = false
diff --git a/src/services/coreService.ts b/src/services/coreService.ts
index 267f86d2c11..aa88642dedb 100644
--- a/src/services/coreService.ts
+++ b/src/services/coreService.ts
@@ -17,6 +17,7 @@ type SearchPayload = {
 	searchText: string
 	token?: string | 'new'
 	onlyUsers?: boolean
+	forceTypes?: typeof SHARE.TYPE[keyof typeof SHARE.TYPE][]
 }
 
 /**
@@ -26,18 +27,19 @@ type SearchPayload = {
  * @param payload.searchText The string that will be used in the search query.
  * @param [payload.token] The token of the conversation (if any) | 'new' for new conversations
  * @param [payload.onlyUsers] Whether to return only registered users
+ * @param [payload.forceTypes] Whether to force some types to be included in query
  * @param options options
  */
-const autocompleteQuery = async function({ searchText, token = 'new', onlyUsers = false }: SearchPayload, options: object) {
+const autocompleteQuery = async function({ searchText, token = 'new', onlyUsers = false, forceTypes = [] }: SearchPayload, options: object) {
 	const shareTypes = onlyUsers
-		? [SHARE.TYPE.USER]
+		? [SHARE.TYPE.USER].concat(forceTypes)
 		: [
 			SHARE.TYPE.USER,
 			SHARE.TYPE.GROUP,
 			SHARE.TYPE.CIRCLE,
 			token !== 'new' ? SHARE.TYPE.EMAIL : null,
 			canInviteToFederation ? SHARE.TYPE.REMOTE : null,
-		].filter(type => type !== null)
+		].filter(type => type !== null).concat(forceTypes)
 
 	return axios.get(generateOcsUrl('core/autocomplete/get'), {
 		...options,