Maximum URL length which is 'safe' in outlook api get requests

Question

I am using outlook rest api v2 (https://msdn.microsoft.com/en-us/office/office365/api/api-catalog)

What is the maximum URL length which is 'safe' for a get request. In my case i would like to request the messages from a group of several conversations. I came up with a request looking something like this (assume conversation IDs are different):

https://outlook.office.com/api/v2.0/me/mailfolders/inbox/messages?$filter=ConversationId eq 'AAQkADNjZDVkNTljLTMwNmEtNDM1Yi1iZjgyLTAwNTgzYzBmNDc4NQAQAA6kWdKUPhNGknn6sPucTnE=' or ConversationId eq 'AAQkADNjZDVkNTljLTMwNmEtNDM1Yi1iZjgyLTAwNTgzYzBmNDc4NQAQAA6kWdKUPhNGknn6sPucTnE=' or ConversationId eq 'AAQkADNjZDVkNTljLTMwNmEtNDM1Yi1iZjgyLTAwNTgzYzBmNDc4NQAQAA6kWdKUPhNGknn6sPucTnE='

I was wondering how many of those 'or' clauses can i safely join in one request. Are there any limitations in Outlook API aside from the 'standard' URL length limitations?

Possible duplicate of Best way to achieve Conversation view for mail folder using Outlook REST API — Benoit Patra
Retrieving mail "by conversation" is a requested feature on uservoice. Consider upvoting officespdev.uservoice.com/forums/… — Benoit Patra

Yogesh Yogesh · Accepted Answer · 2017-02-10T11:09:03

You should rather use $batch (documented here: https://msdn.microsoft.com/en-us/office/office365/api/batch-outlook-rest-requests).

Put each filter in its own query. I believe you can make up to 20 requests.

Maximum URL length which is 'safe' in outlook api get requests

1 Answers