Sync error with professional APN

[victoriseup]

Hi all,

On my professional smartphone, I can't synchronize my Owncloud account (or NextCloud) since the migration of client accounts from the old APN to the new one by Orange operator (that I knew by calling the hotline) called "orange-company" ("orange-entreprise" in french). I think it's due to a censorship of my company, as is already the case with many internet website until now (like ebay, see screenshot below).

The synchronization works very well on the "Orange World" APN but I do not have access to the intranet, which I need to work ...And switch between the two is not really practical ... WiFi is OK too.

I had already had the same symptom a few months ago, which I had resolved passing from "CalDAV-sync" to "DAVdroid".
I go a little pessimistic but have you ever encountered this case, and is it possible to circumvent it?

--- BEGIN DEBUG INFO ---

SOFTWARE INFORMATION
DAVdroid version: 1.5.2-ose (147) Mon May 15 20:04:33 GMT+02:00 2017
Installed from: org.fdroid.fdroid
JB Workaround installed: no

CONFIGURATION
Power saving disabled: yes
android.permission.READ_CONTACTS permission: granted
android.permission.WRITE_CONTACTS permission: granted
android.permission.READ_CALENDAR permission: granted
android.permission.WRITE_CALENDAR permission: granted
org.dmfs.permission.READ_TASKS permission: denied
org.dmfs.permission.WRITE_TASKS permission: denied
System-wide synchronization: automatically
Account: Zaclys
Address book sync. interval: 240 min
Calendar sync. interval: 240 min
OpenTasks sync. interval: —
WiFi only: false
[CardDAV] Contact group method: CATEGORIES
[CalDAV] Time range (past days): 365
Manage calendar colors: true
Address book account: Contacts (Zaclys vg)
Main account: Account {name=Zaclys, type=bitfire.at.davdroid}
URL: https://ncloud.zaclys.com/remote.php/dav/addressbooks/users/14933/contacts/
Sync automatically: true

SQLITE DUMP
android_metadata
| locale |
| en_GB |

settings
| setting | value |
| hint_OpenTasksNotInstalled | 0 |

services
| _id | accountName | service | principal |
| 3 | Zaclys | carddav | https://ncloud.zaclys.com/remote.php/dav/principals/users/14933/ |
| 4 | Zaclys | caldav | https://ncloud.zaclys.com/remote.php/dav/principals/users/14933/ |

sqlite_sequence
| name | seq |
| services | 4 |
| homesets | 5 |
| collections | 10 |

homesets
| _id | serviceID | url |
| 4 | 4 | https://ncloud.zaclys.com/remote.php/dav/calendars/14933/ |
| 5 | 3 | https://ncloud.zaclys.com/remote.php/dav/addressbooks/users/14933/ |

collections
| _id | serviceID | url | readOnly | displayName | description | color | timezone | supportsVEVENT | supportsVTODO | sync |
| 7 | 4 | https://ncloud.zaclys.com/remote.php/dav/calendars/14933/pro/ | 0 | Pro | <null> | -65536 | <null> | 1 | 1 | 1 |
| 8 | 4 | https://ncloud.zaclys.com/remote.php/dav/calendars/14933/contact_birthdays/ | 1 | Anniversaires des contacts | <null> | -54 | <null> | 1 | 1 | 0 |
| 9 | 4 | https://ncloud.zaclys.com/remote.php/dav/calendars/14933/personnel/ | 0 | Personnel | <null> | -16776961 | <null> | 1 | 1 | 1 |
| 10 | 3 | https://ncloud.zaclys.com/remote.php/dav/addressbooks/users/14933/contacts/ | 0 | Contacts | <null> | <null> | <null> | <null> | <null> | 1 |

SYSTEM INFORMATION
Android version: 6.0.1 (MMB29K.A310FXXU2BQA3)
Device: Samsung SM-A310F (a3xelte)

--- END DEBUG INFO ---

Thanks for reading me.

Victo Rise Up