diff --git a/apps/dav/lib/Capabilities.php b/apps/dav/lib/Capabilities.php
index b0f63f80f2daf..36d56d4a822e1 100644
--- a/apps/dav/lib/Capabilities.php
+++ b/apps/dav/lib/Capabilities.php
@@ -7,15 +7,17 @@
 
 use OCP\Capabilities\ICapability;
 use OCP\IConfig;
+use OCP\User\IAvailabilityCoordinator;
 
 class Capabilities implements ICapability {
 	public function __construct(
 		private IConfig $config,
+		private IAvailabilityCoordinator $coordinator,
 	) {
 	}
 
 	/**
-	 * @return array{dav: array{chunking: string, bulkupload?: string}}
+	 * @return array{dav: array{chunking: string, bulkupload?: string, absence-supported?: bool}}
 	 */
 	public function getCapabilities() {
 		$capabilities = [
@@ -26,6 +28,9 @@ public function getCapabilities() {
 		if ($this->config->getSystemValueBool('bulkupload.enabled', true)) {
 			$capabilities['dav']['bulkupload'] = '1.0';
 		}
+		if ($this->coordinator->isEnabled()) {
+			$capabilities['dav']['absence-supported'] = true;
+		}
 		return $capabilities;
 	}
 }
diff --git a/apps/dav/openapi.json b/apps/dav/openapi.json
index 7045a7f9b274c..e212796304d42 100644
--- a/apps/dav/openapi.json
+++ b/apps/dav/openapi.json
@@ -37,6 +37,9 @@
                             },
                             "bulkupload": {
                                 "type": "string"
+                            },
+                            "absence-supported": {
+                                "type": "boolean"
                             }
                         }
                     }
diff --git a/apps/dav/tests/unit/CalDAV/Reminder/NotificationProviderManagerTest.php b/apps/dav/tests/unit/CalDAV/Reminder/NotificationProviderManagerTest.php
index 6c46a2aed2d50..6d0e62f505b52 100644
--- a/apps/dav/tests/unit/CalDAV/Reminder/NotificationProviderManagerTest.php
+++ b/apps/dav/tests/unit/CalDAV/Reminder/NotificationProviderManagerTest.php
@@ -17,6 +17,9 @@
 use OCP\AppFramework\QueryException;
 use Test\TestCase;
 
+/**
+ * @group DB
+ */
 class NotificationProviderManagerTest extends TestCase {
 
 	/** @var NotificationProviderManager|\PHPUnit\Framework\MockObject\MockObject */
diff --git a/apps/dav/tests/unit/CapabilitiesTest.php b/apps/dav/tests/unit/CapabilitiesTest.php
index acdfb4a244324..4a2d7e8dba692 100644
--- a/apps/dav/tests/unit/CapabilitiesTest.php
+++ b/apps/dav/tests/unit/CapabilitiesTest.php
@@ -7,6 +7,7 @@
 
 use OCA\DAV\Capabilities;
 use OCP\IConfig;
+use OCP\User\IAvailabilityCoordinator;
 use Test\TestCase;
 
 /**
@@ -19,7 +20,11 @@ public function testGetCapabilities(): void {
 			->method('getSystemValueBool')
 			->with('bulkupload.enabled', $this->isType('bool'))
 			->willReturn(false);
-		$capabilities = new Capabilities($config);
+		$coordinator = $this->createMock(IAvailabilityCoordinator::class);
+		$coordinator->expects($this->once())
+			->method('isEnabled')
+			->willReturn(false);
+		$capabilities = new Capabilities($config, $coordinator);
 		$expected = [
 			'dav' => [
 				'chunking' => '1.0',
@@ -34,7 +39,11 @@ public function testGetCapabilitiesWithBulkUpload(): void {
 			->method('getSystemValueBool')
 			->with('bulkupload.enabled', $this->isType('bool'))
 			->willReturn(true);
-		$capabilities = new Capabilities($config);
+		$coordinator = $this->createMock(IAvailabilityCoordinator::class);
+		$coordinator->expects($this->once())
+			->method('isEnabled')
+			->willReturn(false);
+		$capabilities = new Capabilities($config, $coordinator);
 		$expected = [
 			'dav' => [
 				'chunking' => '1.0',
@@ -43,4 +52,24 @@ public function testGetCapabilitiesWithBulkUpload(): void {
 		];
 		$this->assertSame($expected, $capabilities->getCapabilities());
 	}
+
+	public function testGetCapabilitiesWithAbsence(): void {
+		$config = $this->createMock(IConfig::class);
+		$config->expects($this->once())
+			->method('getSystemValueBool')
+			->with('bulkupload.enabled', $this->isType('bool'))
+			->willReturn(false);
+		$coordinator = $this->createMock(IAvailabilityCoordinator::class);
+		$coordinator->expects($this->once())
+			->method('isEnabled')
+			->willReturn(true);
+		$capabilities = new Capabilities($config, $coordinator);
+		$expected = [
+			'dav' => [
+				'chunking' => '1.0',
+				'absence-supported' => true,
+			],
+		];
+		$this->assertSame($expected, $capabilities->getCapabilities());
+	}
 }