I can set up an account fine and davdroid finds the address book on the server but no contacts get synced. This issue has also been reported in the Memotoo forum. https://www.memotoo.com/gb/index.php?rub=forum
I/davdroid.ContactsSyncAdapter(30694): httpClient = ch.boye.httpclientandroidlib.impl.client.InternalHttpClient@4200aa18
I/davdroid.DavSyncAdapter(30694): Performing sync for authority com.android.contacts
I/davdroid.ContactsSyncAdapter(30694): httpClient 2 = ch.boye.httpclientandroidlib.impl.client.InternalHttpClient@4200aa18
D/davdroid.WebDavResource(30694): Using preemptive authentication (not compatible with Digest auth)
I/davdroid.SyncManager(30694): Remotely removing 0 deleted resource(s) (if not changed)
I/davdroid.SyncManager(30694): Uploading 0 new resource(s) (if not existing)
I/davdroid.SyncManager(30694): Uploading 0 modified resource(s) (if not changed)
I/davdroid.SyncManager(30694): Synchronization forced
I/davdroid.SyncManager(30694): Fetching remote resource list
D/davdroid.SNISocketFactory(30694): Setting SNI hostname
I/davdroid.SNISocketFactory(30694): Established TLSv1 connection with sync.memotoo.com using SSL_RSA_WITH_RC4_128_SHA
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 >> "PROPFIND /cardDAV/DoubtedEd/addressbook/ HTTP/1.1[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 >> "Content-Type: text/xml; charset=UTF-8[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 >> "Depth: 1[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 >> "Content-Length: 134[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 >> "Host: sync.memotoo.com:443[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 >> "Connection: Keep-Alive[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 >> "User-Agent: DAVdroid/0.5.11-alpha[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 >> "Accept-Encoding: gzip,deflate[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 >> "Authorization: Basic xxxxxxxxx[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 >> "[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 >> "<propfind xmlns="DAV:">[\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 >> " <prop>[\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 >> " <CS:getctag xmlns:CS="http://calendarserver.org/ns/"/>[\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 >> " <getetag/>[\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 >> " </prop>[\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 >> "</propfind>"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "HTTP/1.1 207 Multi-Status[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "Date: Mon, 31 Mar 2014 21:59:41 GMT[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "Server: Apache/2.2[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "Set-Cookie: PHPSESSID=54n6rklq0cun6ata36tkp9cuj3; path=/[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "Expires: Thu, 19 Nov 1981 08:52:00 GMT[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "Pragma: no-cache[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "X-Robots-Tag: noindex, nofollow[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "X-Dav-Powered-By: Memotoo DAV server[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "X-WebDAV-Status: 207 Multi-Status[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "Vary: Accept-Encoding[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "Content-Encoding: gzip[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "Content-Length: 245[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "Connection: close[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "Content-Type: text/xml; charset=UTF-8[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "[\r][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "[0x1f][0x8b][0x8][0x0][0x0][0x0][0x0][0x0][0x0][0x3]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "UP[0xcb]j[0xc3]0[0x10][0xbc][0x17][0xfa][0xf]F[0xf7]z[0xad][0x4][0x9a]V[0xd8][0xe][0x1][0x15][\n]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "=[0xb4][0x87][0xd0][0xbb]bm[0x1c][0x13]ge[0xb4]r[0xe9][0xe7]W[0x8a][0x1d][0xdc][0xdc]vfgf[0x1f][0xe5][0xf6][0xf7][0xd2]g?[0xe8][0xb9]sT[0x9][0x99][0x17]"Cj[0x9c][0xed][0xa8][0xad][0xc4][0x18][0x8e]O/b[?>[0x94]Z][0xc6]>t[0x1c]L[0x18]9[0x8b]&b[0xa5]+[0xa1]w[0xdf]J[0xcc][0x90]XV[0xe2][0x14][0xc2][0xa0][0x0][0x1a][0xd3]#Y[0xe3][0x19]}[0xc][0xcf][0x9d]o[0x81][0x18][0xc4][0x94][0xe4][0x91][0x7]G[0x8c][0x13]:y<[0xd6][0xd1][0xe0]m[0xc][0x3][0xed][0xc6]C@[0xfb]f[0xc1]X[0x1b][0x85]|p[0xee][0xc]%[0xcc][0xba][0xab]c[0xf0]nH[0x8b],(Uq[0xbc]j14[0xc1][0xb4][0xb5][0xbf]>[0xaf][0xb][0xb9][0x91][0x9b][0x12][0xfe][0xf3]WC[0x4][0x98][0x80] G(R[0xf4][0x8d][0x89]mX[0x2][0xb5][0x9a][0xae][0xad][0xdf][0xf7][0xfb]/[0x90][0xb9][0xcc]VE[0x91]}~$[0xcd][0xdc]Y[0xc][0xb7]}[0xe0][0xfe]<[0xb8][0xfb][d[0xfe][0x0]"
D/ch.boye.httpclientandroidlib.wire(30694): http-outgoing-0 << "_[0xeb][0xe5]aq[0x1][0x0][0x0]"
D/davdroid.WebDavResource(30694): Processing multi-status element: https://sync.memotoo.com:443/cardDAV/DoubtedEd/addressbook/
I/davdroid.SyncManager(30694): Fetching 0 new remote resource(s)
I/davdroid.SyncManager(30694): Fetching 0 updated remote resource(s)
I/davdroid.SyncManager(30694): Removing non-dirty resources that are not present remotely anymore
D/davdroid.LocalCollection(30694): Committing 1 operations
I/davdroid.SyncManager(30694): Sync complete, fetching new CTag
E/dalvikvm(30767): /system/priv-app/DeskClock.apk odex has stale dependencies
E/dalvikvm(30789): /system/framework/android.test.runner.jar odex has stale dependencies
E/dalvikvm(30789): /system/priv-app/CalendarProvider.apk odex has stale dependencies
E/dalvikvm(30842): /system/priv-app/Calendar.apk odex has stale dependencies
E/MDMCTBK ( 269): MdmCutbackHndler,Could not open ''