return runJob<KDAV2::DavCollection::List>(new KDAV2::DavCollectionsFetchJob{ serverUrl },
    [](KJob *job) { return static_cast<KDAV2::DavCollectionsFetchJob *>(job)->collections(); })
    .serialEach([=](const KDAV2::DavCollection &collection) {
        const auto collectionRid = resourceID(collection);
        const auto localId = syncStore().resolveRemoteId(mCollectionType, collectionRid);

        return synchronizeCollection(collection.url(), collectionRid, localId, collection.CTag().toLatin1())
            .then([=] (const KAsync::Error &error) {
                if (error) {
                    SinkWarningCtx(mLogCtx) << "Failed to synchronized folder" << error;
                }
                //Ignore synchronization errors for individual collections, the next one might work.
                return KAsync::null();
            });
    });