diff --git a/CHANGELOG.md b/CHANGELOG.md
index 45f1874f..2f3351f7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## 3.7.8.dev
 * Fix: sharing/proppatch: reject in case of write-access but 'p' is in permissions
+* Fix: sharing/by-map: catch collection path without trailing / (supporting "pimsync")
 
 ## 3.7.7
 * Fix: web plugin helpers httputils.serve_resource/serve_folder ignored their mimetypes and fallback_mimetype parameters and always used the built-in mapping, so custom web plugins could not serve additional file types with a correct Content-Type
diff --git a/radicale/sharing/__init__.py b/radicale/sharing/__init__.py
index 3cf8bdfd..88874d31 100644
--- a/radicale/sharing/__init__.py
+++ b/radicale/sharing/__init__.py
@@ -628,6 +628,7 @@ class BaseSharing:
         """ returning dict with PathMapped, Owner, Permissions or None if invalid"""
         if self.sharing_collection_by_map:
             logger.trace("sharing/map/resolver: check path: %r", path)
+            # check collection path
             result = self.database_get_sharing(
                 ShareType="map",
                 PathOrToken=path,
@@ -635,7 +636,7 @@ class BaseSharing:
                 User=user)
 
             if not result:
-                # fallback to parent path
+                # assume item path, fallback to parent path
                 parent_path = pathutils.parent_path(path)
                 logger.trace("sharing/map/resolver: check parent path: %r", parent_path)
                 result = self.database_get_sharing(
@@ -646,9 +647,19 @@ class BaseSharing:
                 if result:
                     result['PathMapped'] = path.replace(parent_path, result['PathMapped'])
                     logger.trace("sharing/map/resolver: PathMapped=%r Permissions=%r by parent_path=%r", result['PathMapped'], result['Permissions'], parent_path)
-                else:
-                    logger.trace("sharing/map/resolver: not found")
-                    return None
+
+            if not result and not path.endswith("/"):
+                # assume collection path with missing trailing /
+                path_with_trailing_slash = path + "/"
+                logger.trace("sharing/map/resolver: check path having '/' appended: %r", path_with_trailing_slash)
+                result = self.database_get_sharing(
+                        ShareType="map",
+                        PathOrToken=path_with_trailing_slash,
+                        OnlyEnabled=False,
+                        User=user)
+                if result:
+                    path = path_with_trailing_slash
+                    logger.trace("sharing/map/resolver: PathMapped=%r Permissions=%r by path_with_trailing_slash=%r", result['PathMapped'], result['Permissions'], path_with_trailing_slash)
 
             if result:
                 if result['EnabledByOwner'] is not True:
@@ -666,6 +677,7 @@ class BaseSharing:
                 logger.info("sharing/%s: resolved path %r->%r, user %r->%r, Permissions=%r Conversion=%r", "map", result['PathOrToken'], result['PathMapped'], user, result['Owner'], result['Permissions'], result['Conversion'])
                 return result
 
+            logger.trace("sharing/map/resolver: not found")
             return None
         else:
             logger.trace("sharing/map: not active")
diff --git a/radicale/tests/test_sharing.py b/radicale/tests/test_sharing.py
index cfa85815..be26c11f 100644
--- a/radicale/tests/test_sharing.py
+++ b/radicale/tests/test_sharing.py
@@ -1988,10 +1988,34 @@ class TestSharingApiSanity(BaseTest):
             json_dict['PathOrToken'] = path_shared
             _, headers, answer = self._sharing_api_json("map", "enable", check=200, login="user:userpw", json_dict=json_dict)
 
+            # check GET as user
+            logging.info("\n*** GET collection user -> ok")
+            _, headers, answer = self.request("GET", path_shared, check=200, login="user:userpw")
+
             # check REPORT as user
             logging.info("\n*** REPORT collection user -> ok")
             _, responses = self.report(path_shared, """\
 <?xml version="1.0" encoding="utf-8" ?>
+<C:calendar-query xmlns:C="urn:ietf:params:xml:ns:caldav">
+    <D:prop xmlns:D="DAV:">
+        <D:getetag />
+    </D:prop>
+</C:calendar-query>""", login="user:userpw")
+            assert len(responses) == 1
+            logging.info("response: %r", responses)
+            response = responses[path_shared_item]
+            assert isinstance(response, dict)
+            status, prop = response["D:getetag"]
+            assert status == 200 and prop.text
+
+            # check GET as user without trailing /
+            logging.info("\n*** GET collection user (without trailing /) -> ok")
+            _, headers, answer = self.request("GET", path_shared.removesuffix("/"), check=200, login="user:userpw")
+
+            # check REPORT as user without trailing /
+            logging.info("\n*** REPORT collection user (without trailing /) -> ok")
+            _, responses = self.report(path_shared.removesuffix("/"), """\
+<?xml version="1.0" encoding="utf-8" ?>
 <C:calendar-query xmlns:C="urn:ietf:params:xml:ns:caldav">
     <D:prop xmlns:D="DAV:">
         <D:getetag />