AnsweredAssumed Answered

Lenovo Tab4 8 with Android 7.1.1 - certificate issues

Question asked by dlengtonesri-southafrica-esridist Employee on Jul 19, 2018
Latest reply on Nov 19, 2018 by ichivite-esristaff

We have a client that have an Portal installation and Esri apps for the field work (Survey123, Workforce, Collector)


In short: Survey123 does not log in when using a local certificate authority certificate but works fine when using a public certificate:


  1. Client’s GIS and Planning Unit server is back facing and not public facing
  2. Due to the above they require security certificates to allow for communication between the 3 apps we use (Workforce, Survey123 and Collector) and our ArcGIS Portal
  3. Initially they had these deployed on Lenovo Tab4 8’s (Tab 4 8 | A Premium 8” Tablet for the Whole Family | Lenovo South Africa ) which initially had Android 6.6 – The apps ran perfectly
  4. They then did an OS update on the tablets to Android 7.1.1
  5. Unknown to them, Android 7 has new security protocols that do not read user uploaded certificates
  6. This then caused SSL handshake errors between the apps and our portal


Does anyone know how to work around this problem?