[horde] ActiveSync with Outlook 2016: Collections not PINGable

[Arjen de Korte]

Citeren Volker Then <horde40 at volkerthen.com>:

> Hi,
>
> now that I have Outlook 2016 with Horde running, I have already a  
> problem with the first set-up. IMAP folders and subfolders are not  
> getting synced with resulting log entries like
>
> 539][2018-01-30T14:25:43+01:00] INFO: COLLECTIONS: Initializing  
> state for collection: Trash, synckey:  
> {5a705f6b-ae88-431a-9e75-3084ac1f0164}3
> [539][2018-01-30T14:25:43+01:00] NOTICE: COLLECTIONS: Skipping  
> F46d058b1 because it is not PINGable.
>
> Only things that got synced are Inbox, Calendar, Tasks, Contacts, Notes.
>
> Corresponding error messages in the horde.log are only like this:
>
> 2018-01-30T14:30:29+01:00 EMERG: HORDE Allowed memory size of  
> 536870912 bytes exhausted (tried to allocate 603979776 bytes) [pid  
> 2819 on line 1090 of "/usr/share/php/Math/BigInteger.php"]
>
> If I expand the php memory limit, it got exhausted too.

Install the 'bcmath' extension. This will be a requirement in future  
releases. See  
https://github.com/horde/Mapi/commit/acf8b124a1e969ab52bc1d17c3b425106de84fa9

> I already deleted the device in horde's activesync setting, which  
> had no effect on the sync behaviour. Syncing with an iOS device is  
> working.
>
> Thanks in advance for any help
>
> Volker