diff --git a/packages/backend/src/server/api/endpoints/chat/read-all.ts b/packages/backend/src/server/api/endpoints/chat/read-all.ts
index 2ed9497eef..e2d9601aa6 100644
--- a/packages/backend/src/server/api/endpoints/chat/read-all.ts
+++ b/packages/backend/src/server/api/endpoints/chat/read-all.ts
@@ -32,6 +32,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private chatService: ChatService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
+			await this.chatService.checkChatAvailability(me.id, 'read');
+
 			await this.chatService.readAllChatMessages(me.id);
 		});
 	}
diff --git a/packages/backend/src/server/api/endpoints/drive/files/attached-chat-messages.ts b/packages/backend/src/server/api/endpoints/drive/files/attached-chat-messages.ts
index 5be477f468..b34ac4abd1 100644
--- a/packages/backend/src/server/api/endpoints/drive/files/attached-chat-messages.ts
+++ b/packages/backend/src/server/api/endpoints/drive/files/attached-chat-messages.ts
@@ -10,6 +10,7 @@ import { QueryService } from '@/core/QueryService.js';
 import { DI } from '@/di-symbols.js';
 import { RoleService } from '@/core/RoleService.js';
 import { ChatEntityService } from '@/core/entities/ChatEntityService.js';
+import { ChatService } from '@/core/ChatService.js';
 import { ApiError } from '../../../error.js';
 
 export const meta = {
@@ -60,14 +61,21 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		@Inject(DI.chatMessagesRepository)
 		private chatMessagesRepository: ChatMessagesRepository,
 
+		private chatService: ChatService,
 		private chatEntityService: ChatEntityService,
 		private queryService: QueryService,
 		private roleService: RoleService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
+			const isModerator = await this.roleService.isModerator(me);
+
+			if (!isModerator) {
+				await this.chatService.checkChatAvailability(me.id, 'read');
+			}
+
 			const file = await this.driveFilesRepository.findOneBy({
 				id: ps.fileId,
-				userId: await this.roleService.isModerator(me) ? undefined : me.id,
+				userId: isModerator ? undefined : me.id,
 			});
 
 			if (file == null) {
diff --git a/packages/frontend/src/pages/settings/other.vue b/packages/frontend/src/pages/settings/other.vue
index c896ee8232..30ab2ce11e 100644
--- a/packages/frontend/src/pages/settings/other.vue
+++ b/packages/frontend/src/pages/settings/other.vue
@@ -128,9 +128,11 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 		<hr>
 
-		<MkButton @click="readAllChatMessages">Read all chat messages</MkButton>
+		<template v-if="$i.policies.chatAvailability !== 'unavailable'">
+			<MkButton @click="readAllChatMessages">Read all chat messages</MkButton>
 
-		<hr>
+			<hr>
+		</template>
 
 		<FormSlot>
 			<MkButton danger @click="migrate"><i class="ti ti-refresh"></i> {{ i18n.ts.migrateOldSettings }}</MkButton>