I make some synchronization features with freeipa. For this i need to fetch 
users from LDAP db.
By default search limit is 2000 users both in GUI and API.
So i made modofications in freeipa configs

ldapmodify -x -D "cn=Directory Manager" -W -H ldap://localhost

dn: cn=config
changetype: modify
replace: nsslapd-sizelimit
nsslapd-sizelimit: 20000000

so all started to work fine, for starter there were just around 3000 users in 
db so it worked fine, returned all users.
then i started to generate new users to see perfomance of DB, so i used 
"pkey_only: true" in "user_find" command so when quantity of users reached 90k 
users  it spend around 25sec to response, so ok its tolerable....
so all 90k+ users still returned by API

So issue happened when quantity of users reached around 100ะบ+ users, so search 
limit shrinked to 49629 users
shrikage info started to add to responses

"count": 49629,
        "truncated": true,
        "messages": [
            {
                "type": "warning",
                "name": "SearchResultTruncated",
                "message": "Search result has been truncated: Configured 
administrative server limit exceeded",
                "code": 13017,
                "data": {
                    "reason": "Configured administrative server limit exceeded"
                }
            }
        ]

i do not do anything with freeipa server, just worked python script which 
generated users, script worked delicate and slow , he always waited for 
response from API that user created before creating another one user, so there 
were no high parallel overload on DB

so i searched for nsslapd-sizelimit again with command:
ldapsearch -x -D "cn=Directory Manager" -W -H ldap://localhost -b "cn=config" 
nsslapd-sizelimit
but is showed normally nsslapd-sizelimit: 20000000
so with settings all fine, it shows that number that i set

so what happened? Where  freeipa get this strange limit in 49629 users and why? 
How to handle this? so projected size of LDAP DB is around 15 millons users
I tried to workaround this with python ldap-3 library in hope it make some more 
low-level requests without any limits, but via python script i have this limit 
too, so its totally global for all, UI, API and python API...
So how to remove this strange limit? 
--
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