diff --git a/admin/src/components/Federation/CommunityVisualizeItem.vue b/admin/src/components/Federation/CommunityVisualizeItem.vue
index ecb4b79a0..72801426d 100644
--- a/admin/src/components/Federation/CommunityVisualizeItem.vue
+++ b/admin/src/components/Federation/CommunityVisualizeItem.vue
@@ -28,6 +28,9 @@
           <BListGroupItem>
             {{ $t('federation.publicKey') }}&nbsp;{{ item.publicKey }}
           </BListGroupItem>
+          <BListGroupItem v-if="item.hieroTopicId && item.foreign">
+            {{ $t('federation.hieroTopicId') }}&nbsp;{{ item.hieroTopicId }}
+          </BListGroupItem>
           <BListGroupItem v-if="!item.foreign">
             <editable-group
               :allow-edit="$store.state.moderator.roles.includes('ADMIN')"
@@ -39,6 +42,10 @@
                   <p style="text-wrap: nowrap">{{ $t('federation.gmsApiKey') }}&nbsp;</p>
                   <span class="d-block" style="overflow-x: auto">{{ gmsApiKey }}</span>
                 </div>
+                <div class="d-flex">
+                  <p style="text-wrap: nowrap">{{ $t('federation.hieroTopicId') }}&nbsp;</p>
+                  <span class="d-block" style="overflow-x: auto">{{ hieroTopicId }}</span>
+                </div>
                 <BFormGroup>
                   {{ $t('federation.coordinates') }}
                   <span v-if="isValidLocation">
@@ -57,6 +64,11 @@
                   :label="$t('federation.gmsApiKey')"
                   id-name="home-community-api-key"
                 />
+                <editable-groupable-label
+                  v-model="hieroTopicId"
+                  :label="$t('federation.hieroTopicId')"
+                  id-name="home-community-hiero-topic-id"
+                />
                 <coordinates v-model="location" />
               </template>
             </editable-group>
@@ -111,9 +123,11 @@ const { toastSuccess, toastError } = useAppToast()
 
 const details = ref(false)
 const gmsApiKey = ref(item.value.gmsApiKey)
+const hieroTopicId = ref(item.value.hieroTopicId)
 const location = ref(item.value.location)
 const originalGmsApiKey = ref(item.value.gmsApiKey)
 const originalLocation = ref(item.value.location)
+const originalHieroTopicId = ref(item.value.hieroTopicId)
 
 const { mutate: updateHomeCommunityMutation } = useMutation(updateHomeCommunity)
 
@@ -164,6 +178,7 @@ const createdAt = computed(() => {
 
 const isLocationChanged = computed(() => originalLocation.value !== location.value)
 const isGMSApiKeyChanged = computed(() => originalGmsApiKey.value !== gmsApiKey.value)
+const isHieroTopicIdChanged = computed(() => originalHieroTopicId.value !== hieroTopicId.value)
 const isValidLocation = computed(
   () => location.value && location.value.latitude && location.value.longitude,
 )
@@ -178,6 +193,7 @@ const handleUpdateHomeCommunity = async () => {
       uuid: item.value.uuid,
       gmsApiKey: gmsApiKey.value,
       location: location.value,
+      hieroTopicId: hieroTopicId.value,
     })
 
     if (isLocationChanged.value && isGMSApiKeyChanged.value) {
@@ -187,8 +203,12 @@ const handleUpdateHomeCommunity = async () => {
     } else if (isLocationChanged.value) {
       toastSuccess(t('federation.toast_gmsLocationUpdated'))
     }
+    if (isHieroTopicIdChanged.value) {
+      toastSuccess(t('federation.toast_hieroTopicIdUpdated'))
+    }
     originalLocation.value = location.value
     originalGmsApiKey.value = gmsApiKey.value
+    originalHieroTopicId.value = hieroTopicId.value
   } catch (error) {
     toastError(error.message)
   }
@@ -197,5 +217,6 @@ const handleUpdateHomeCommunity = async () => {
 const resetHomeCommunityEditable = () => {
   location.value = originalLocation.value
   gmsApiKey.value = originalGmsApiKey.value
+  hieroTopicId.value = originalHieroTopicId.value
 }
 </script>
diff --git a/admin/src/graphql/allCommunities.js b/admin/src/graphql/allCommunities.js
index c2ccdd15e..5e320dd75 100644
--- a/admin/src/graphql/allCommunities.js
+++ b/admin/src/graphql/allCommunities.js
@@ -15,6 +15,7 @@ export const allCommunities = gql`
       creationDate
       createdAt
       updatedAt
+      hieroTopicId
       federatedCommunities {
         id
         apiVersion
diff --git a/admin/src/graphql/updateHomeCommunity.js b/admin/src/graphql/updateHomeCommunity.js
index a05cb7fd8..19bfb7396 100644
--- a/admin/src/graphql/updateHomeCommunity.js
+++ b/admin/src/graphql/updateHomeCommunity.js
@@ -1,8 +1,13 @@
 import gql from 'graphql-tag'
 
 export const updateHomeCommunity = gql`
-  mutation ($uuid: String!, $gmsApiKey: String, $location: Location) {
-    updateHomeCommunity(uuid: $uuid, gmsApiKey: $gmsApiKey, location: $location) {
+  mutation ($uuid: String!, $gmsApiKey: String, $location: Location, $hieroTopicId: String) {
+    updateHomeCommunity(
+      uuid: $uuid
+      gmsApiKey: $gmsApiKey
+      location: $location
+      hieroTopicId: $hieroTopicId
+    ) {
       id
     }
   }
diff --git a/admin/src/locales/de.json b/admin/src/locales/de.json
index 51e7c351b..d1622fb8d 100644
--- a/admin/src/locales/de.json
+++ b/admin/src/locales/de.json
@@ -96,9 +96,11 @@
     "coordinates": "Koordinaten:",
     "createdAt": "Erstellt am",
     "gmsApiKey": "GMS API Key:",
+    "hieroTopicId": "Hiero Topic ID:",
     "toast_gmsApiKeyAndLocationUpdated": "Der GMS Api Key und die Location wurden erfolgreich aktualisiert!",
     "toast_gmsApiKeyUpdated": "Der GMS Api Key wurde erfolgreich aktualisiert!",
     "toast_gmsLocationUpdated": "Die GMS Location wurde erfolgreich aktualisiert!",
+    "toast_hieroTopicIdUpdated": "Die Hiero Topic ID wurde erfolgreich aktualisiert!",
     "gradidoInstances": "Gradido Instanzen",
     "lastAnnouncedAt": "letzte Bekanntgabe",
     "lastErrorAt": "Letzer Fehler am",
diff --git a/admin/src/locales/en.json b/admin/src/locales/en.json
index 070c2fc20..6119ffc41 100644
--- a/admin/src/locales/en.json
+++ b/admin/src/locales/en.json
@@ -96,9 +96,11 @@
     "coordinates": "Coordinates:",
     "createdAt": "Created At ",
     "gmsApiKey": "GMS API Key:",
+    "hieroTopicId": "Hiero Topic ID:",
     "toast_gmsApiKeyAndLocationUpdated": "The GMS Api Key and the location have been successfully updated!",
     "toast_gmsApiKeyUpdated": "The GMS Api Key has been successfully updated!",
     "toast_gmsLocationUpdated": "The GMS location has been successfully updated!",
+    "toast_hieroTopicIdUpdated": "The Hiero Topic ID has been successfully updated!",
     "gradidoInstances": "Gradido Instances",
     "lastAnnouncedAt": "Last Announced",
     "lastErrorAt": "last error at",
diff --git a/backend/src/graphql/input/EditCommunityInput.ts b/backend/src/graphql/input/EditCommunityInput.ts
index 487221920..f81425aae 100644
--- a/backend/src/graphql/input/EditCommunityInput.ts
+++ b/backend/src/graphql/input/EditCommunityInput.ts
@@ -18,4 +18,8 @@ export class EditCommunityInput {
   @Field(() => Location, { nullable: true })
   @isValidLocation()
   location?: Location | null
+
+  @Field(() => String, { nullable: true })
+  @IsString()
+  hieroTopicId?: string | null
 }
diff --git a/backend/src/graphql/model/AdminCommunityView.ts b/backend/src/graphql/model/AdminCommunityView.ts
index aac50e0ed..50cee146a 100644
--- a/backend/src/graphql/model/AdminCommunityView.ts
+++ b/backend/src/graphql/model/AdminCommunityView.ts
@@ -39,6 +39,7 @@ export class AdminCommunityView {
     this.uuid = dbCom.communityUuid
     this.authenticatedAt = dbCom.authenticatedAt
     this.gmsApiKey = dbCom.gmsApiKey
+    this.hieroTopicId = dbCom.hieroTopicId
     if (dbCom.location) {
       this.location = Point2Location(dbCom.location as Point)
     }
@@ -71,6 +72,9 @@ export class AdminCommunityView {
   @Field(() => Location, { nullable: true })
   location: Location | null
 
+  @Field(() => String, { nullable: true })
+  hieroTopicId: string | null
+
   @Field(() => Date, { nullable: true })
   creationDate: Date | null
 
diff --git a/backend/src/graphql/model/Community.ts b/backend/src/graphql/model/Community.ts
index 22dd915ad..62cec9cf7 100644
--- a/backend/src/graphql/model/Community.ts
+++ b/backend/src/graphql/model/Community.ts
@@ -13,6 +13,7 @@ export class Community {
     this.uuid = dbCom.communityUuid
     this.authenticatedAt = dbCom.authenticatedAt
     this.gmsApiKey = dbCom.gmsApiKey
+    this.hieroTopicId = dbCom.hieroTopicId
   }
 
   @Field(() => Int)
@@ -41,4 +42,7 @@ export class Community {
 
   @Field(() => String, { nullable: true })
   gmsApiKey: string | null
+
+  @Field(() => String, { nullable: true })
+  hieroTopicId: string | null
 }
diff --git a/backend/src/graphql/resolver/CommunityResolver.ts b/backend/src/graphql/resolver/CommunityResolver.ts
index 16130f5d4..a46e30144 100644
--- a/backend/src/graphql/resolver/CommunityResolver.ts
+++ b/backend/src/graphql/resolver/CommunityResolver.ts
@@ -80,7 +80,7 @@ export class CommunityResolver {
   @Authorized([RIGHTS.COMMUNITY_UPDATE])
   @Mutation(() => Community)
   async updateHomeCommunity(
-    @Args() { uuid, gmsApiKey, location }: EditCommunityInput,
+    @Args() { uuid, gmsApiKey, location, hieroTopicId }: EditCommunityInput,
   ): Promise<Community> {
     const homeCom = await getCommunityByUuid(uuid)
     if (!homeCom) {
@@ -89,11 +89,16 @@ export class CommunityResolver {
     if (homeCom.foreign) {
       throw new LogError('Error: Only the HomeCommunity could be modified!')
     }
-    if (homeCom.gmsApiKey !== gmsApiKey || homeCom.location !== location) {
+    if (
+      homeCom.gmsApiKey !== gmsApiKey ||
+      homeCom.location !== location ||
+      homeCom.hieroTopicId !== hieroTopicId
+    ) {
       homeCom.gmsApiKey = gmsApiKey ?? null
       if (location) {
         homeCom.location = Location2Point(location)
       }
+      homeCom.hieroTopicId = hieroTopicId ?? null
       await DbCommunity.save(homeCom)
     }
     return new Community(homeCom)
diff --git a/config-schema/src/commonSchema.ts b/config-schema/src/commonSchema.ts
index 12946fdae..250ea3182 100644
--- a/config-schema/src/commonSchema.ts
+++ b/config-schema/src/commonSchema.ts
@@ -92,7 +92,7 @@ export const GMS_ACTIVE = Joi.boolean()
   .required()
 
 export const GDT_ACTIVE = Joi.boolean()
-  .description('Flag to indicate if the GMS (Geographic Member Search) service is used.')
+  .description('Flag to indicate if the GDT (Gradido Transform) service is used.')
   .default(false)
   .required()
 
diff --git a/database/migration/migrations/0092-add_hiero-topic-id_in_community_table.ts b/database/migration/migrations/0092-add_hiero-topic-id_in_community_table.ts
new file mode 100644
index 000000000..d921bdd5e
--- /dev/null
+++ b/database/migration/migrations/0092-add_hiero-topic-id_in_community_table.ts
@@ -0,0 +1,14 @@
+/* MIGRATION TO ADD hiero topic id IN COMMUNITY TABLE
+ *
+ * This migration adds fields for the hiero topic id in the community.table
+ */
+
+export async function upgrade(queryFn: (query: string, values?: any[]) => Promise<Array<any>>) {
+  await queryFn(
+    'ALTER TABLE `communities` ADD COLUMN `hiero_topic_id` varchar(512) DEFAULT NULL AFTER `location`;',
+  )
+}
+
+export async function downgrade(queryFn: (query: string, values?: any[]) => Promise<Array<any>>) {
+  await queryFn('ALTER TABLE `communities` DROP COLUMN `hiero_topic_id`;')
+}
diff --git a/database/src/entity/Community.ts b/database/src/entity/Community.ts
index bee4d5fa8..f6597306a 100644
--- a/database/src/entity/Community.ts
+++ b/database/src/entity/Community.ts
@@ -73,6 +73,9 @@ export class Community extends BaseEntity {
   })
   location: Geometry | null
 
+  @Column({ name: 'hiero_topic_id', type: 'varchar', length: 255, nullable: true })
+  hieroTopicId: string | null
+
   @CreateDateColumn({
     name: 'created_at',
     type: 'datetime',